/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 21:01:33,754 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 21:01:33,756 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 21:01:33,780 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 21:01:33,810 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 21:01:33,810 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 21:01:33,812 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 21:01:33,812 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-20 21:01:33,820 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 21:01:33,820 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 21:01:33,821 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 21:01:33,821 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 21:01:33,821 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 21:01:33,822 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 21:01:33,822 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 21:01:33,822 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 21:01:33,822 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 21:01:33,823 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 21:01:33,823 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 21:01:33,823 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 21:01:33,823 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 21:01:33,823 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 21:01:33,824 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 21:01:33,824 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 21:01:33,824 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 21:01:33,824 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-20 21:01:33,825 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-20 21:01:33,825 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-20 21:01:33,825 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 21:01:33,825 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-20 21:01:33,826 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 21:01:34,038 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 21:01:34,061 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 21:01:34,062 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 21:01:34,063 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 21:01:34,065 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 21:01:34,066 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound5.c [2022-03-20 21:01:34,121 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/48af3b112/c56aee89561941e0a6e279601eb288b8/FLAG0a64590d1 [2022-03-20 21:01:34,499 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 21:01:34,500 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound5.c [2022-03-20 21:01:34,504 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/48af3b112/c56aee89561941e0a6e279601eb288b8/FLAG0a64590d1 [2022-03-20 21:01:34,916 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/48af3b112/c56aee89561941e0a6e279601eb288b8 [2022-03-20 21:01:34,918 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 21:01:34,919 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 21:01:34,924 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 21:01:34,924 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 21:01:34,927 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 21:01:34,927 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 09:01:34" (1/1) ... [2022-03-20 21:01:34,928 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45c76465 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:01:34, skipping insertion in model container [2022-03-20 21:01:34,928 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 09:01:34" (1/1) ... [2022-03-20 21:01:34,933 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 21:01:34,945 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 21:01:35,087 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound5.c[490,503] [2022-03-20 21:01:35,118 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 21:01:35,123 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 21:01:35,131 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound5.c[490,503] [2022-03-20 21:01:35,139 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 21:01:35,149 INFO L208 MainTranslator]: Completed translation [2022-03-20 21:01:35,149 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:01:35 WrapperNode [2022-03-20 21:01:35,150 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 21:01:35,150 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 21:01:35,150 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 21:01:35,151 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 21:01:35,161 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:01:35" (1/1) ... [2022-03-20 21:01:35,161 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:01:35" (1/1) ... [2022-03-20 21:01:35,168 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:01:35" (1/1) ... [2022-03-20 21:01:35,169 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:01:35" (1/1) ... [2022-03-20 21:01:35,184 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:01:35" (1/1) ... [2022-03-20 21:01:35,187 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:01:35" (1/1) ... [2022-03-20 21:01:35,188 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:01:35" (1/1) ... [2022-03-20 21:01:35,190 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 21:01:35,191 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 21:01:35,191 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 21:01:35,191 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 21:01:35,194 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:01:35" (1/1) ... [2022-03-20 21:01:35,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 21:01:35,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:01:35,226 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) [2022-03-20 21:01:35,227 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 [2022-03-20 21:01:35,252 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 21:01:35,252 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 21:01:35,252 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 21:01:35,252 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 21:01:35,252 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 21:01:35,253 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 21:01:35,253 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 21:01:35,253 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 21:01:35,253 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 21:01:35,253 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 21:01:35,253 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 21:01:35,253 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 21:01:35,254 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 21:01:35,254 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 21:01:35,254 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 21:01:35,254 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 21:01:35,254 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 21:01:35,254 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 21:01:35,254 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 21:01:35,254 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 21:01:35,316 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 21:01:35,317 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 21:01:35,438 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 21:01:35,444 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 21:01:35,444 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-03-20 21:01:35,445 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 09:01:35 BoogieIcfgContainer [2022-03-20 21:01:35,446 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 21:01:35,447 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 21:01:35,447 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 21:01:35,450 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 21:01:35,450 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 09:01:34" (1/3) ... [2022-03-20 21:01:35,451 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a3fcd1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 09:01:35, skipping insertion in model container [2022-03-20 21:01:35,451 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:01:35" (2/3) ... [2022-03-20 21:01:35,451 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a3fcd1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 09:01:35, skipping insertion in model container [2022-03-20 21:01:35,451 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 09:01:35" (3/3) ... [2022-03-20 21:01:35,453 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound5.c [2022-03-20 21:01:35,457 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-20 21:01:35,457 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 21:01:35,511 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 21:01:35,517 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 [2022-03-20 21:01:35,517 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 21:01:35,534 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-20 21:01:35,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-20 21:01:35,555 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:01:35,555 INFO L499 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] [2022-03-20 21:01:35,556 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:01:35,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:01:35,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1237885594, now seen corresponding path program 1 times [2022-03-20 21:01:35,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:01:35,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [602381456] [2022-03-20 21:01:35,583 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:01:35,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1237885594, now seen corresponding path program 2 times [2022-03-20 21:01:35,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:01:35,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168754619] [2022-03-20 21:01:35,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:01:35,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:01:35,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 21:01:35,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 21:01:35,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 21:01:35,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 21:01:35,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 21:01:35,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 21:01:35,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 21:01:35,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-20 21:01:35,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 21:01:35,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-20 21:01:35,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 21:01:35,746 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 21:01:35,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:01:35,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168754619] [2022-03-20 21:01:35,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168754619] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:01:35,747 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:01:35,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 21:01:35,750 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:01:35,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [602381456] [2022-03-20 21:01:35,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [602381456] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:01:35,750 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:01:35,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 21:01:35,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213323253] [2022-03-20 21:01:35,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:01:35,755 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 21:01:35,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:01:35,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 21:01:35,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 21:01:35,782 INFO L87 Difference]: Start difference. First operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 21:01:35,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:01:35,892 INFO L93 Difference]: Finished difference Result 73 states and 115 transitions. [2022-03-20 21:01:35,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 21:01:35,896 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2022-03-20 21:01:35,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:01:35,905 INFO L225 Difference]: With dead ends: 73 [2022-03-20 21:01:35,905 INFO L226 Difference]: Without dead ends: 35 [2022-03-20 21:01:35,907 INFO L912 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 [2022-03-20 21:01:35,910 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 24 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 21:01:35,911 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 43 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 21:01:35,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-03-20 21:01:35,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-03-20 21:01:35,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 21:01:35,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2022-03-20 21:01:35,946 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 33 [2022-03-20 21:01:35,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:01:35,946 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2022-03-20 21:01:35,947 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 21:01:35,947 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2022-03-20 21:01:35,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-20 21:01:35,948 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:01:35,948 INFO L499 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] [2022-03-20 21:01:35,949 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 21:01:35,949 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:01:35,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:01:35,950 INFO L85 PathProgramCache]: Analyzing trace with hash 1569470122, now seen corresponding path program 1 times [2022-03-20 21:01:35,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:01:35,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1886453908] [2022-03-20 21:01:35,951 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:01:35,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1569470122, now seen corresponding path program 2 times [2022-03-20 21:01:35,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:01:35,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33729911] [2022-03-20 21:01:35,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:01:35,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:01:35,981 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:01:35,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1086432171] [2022-03-20 21:01:35,982 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 21:01:35,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:01:35,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:01:35,984 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) [2022-03-20 21:01:35,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 21:01:36,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-20 21:01:36,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:01:36,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-20 21:01:36,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:01:36,232 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 21:01:36,233 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 21:01:36,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:01:36,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33729911] [2022-03-20 21:01:36,233 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:01:36,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086432171] [2022-03-20 21:01:36,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086432171] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:01:36,234 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:01:36,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 21:01:36,235 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:01:36,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1886453908] [2022-03-20 21:01:36,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1886453908] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:01:36,236 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:01:36,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 21:01:36,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580607868] [2022-03-20 21:01:36,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:01:36,237 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 21:01:36,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:01:36,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 21:01:36,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 21:01:36,238 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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) [2022-03-20 21:01:36,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:01:36,405 INFO L93 Difference]: Finished difference Result 54 states and 69 transitions. [2022-03-20 21:01:36,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 21:01:36,405 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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 [2022-03-20 21:01:36,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:01:36,409 INFO L225 Difference]: With dead ends: 54 [2022-03-20 21:01:36,409 INFO L226 Difference]: Without dead ends: 51 [2022-03-20 21:01:36,410 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-20 21:01:36,411 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 14 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 21:01:36,416 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 197 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 21:01:36,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-03-20 21:01:36,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2022-03-20 21:01:36,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 30 states have (on average 1.2) internal successors, (36), 31 states have internal predecessors, (36), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-20 21:01:36,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 64 transitions. [2022-03-20 21:01:36,431 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 64 transitions. Word has length 34 [2022-03-20 21:01:36,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:01:36,432 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 64 transitions. [2022-03-20 21:01:36,432 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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) [2022-03-20 21:01:36,432 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 64 transitions. [2022-03-20 21:01:36,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-20 21:01:36,433 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:01:36,433 INFO L499 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] [2022-03-20 21:01:36,458 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 21:01:36,634 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 [2022-03-20 21:01:36,634 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:01:36,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:01:36,635 INFO L85 PathProgramCache]: Analyzing trace with hash 584996456, now seen corresponding path program 1 times [2022-03-20 21:01:36,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:01:36,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [976779890] [2022-03-20 21:01:36,636 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:01:36,636 INFO L85 PathProgramCache]: Analyzing trace with hash 584996456, now seen corresponding path program 2 times [2022-03-20 21:01:36,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:01:36,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326785715] [2022-03-20 21:01:36,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:01:36,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:01:36,654 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:01:36,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1737635841] [2022-03-20 21:01:36,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 21:01:36,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:01:36,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:01:36,672 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) [2022-03-20 21:01:36,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 21:01:36,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 21:01:36,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:01:36,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 21:01:36,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:01:36,818 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-20 21:01:36,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:01:36,965 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-20 21:01:36,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:01:36,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326785715] [2022-03-20 21:01:36,965 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:01:36,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737635841] [2022-03-20 21:01:36,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737635841] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:01:36,966 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:01:36,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-03-20 21:01:36,966 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:01:36,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [976779890] [2022-03-20 21:01:36,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [976779890] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:01:36,967 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:01:36,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 21:01:36,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958894105] [2022-03-20 21:01:36,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:01:36,967 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 21:01:36,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:01:36,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 21:01:36,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-20 21:01:36,968 INFO L87 Difference]: Start difference. First operand 50 states and 64 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 21:01:37,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:01:37,135 INFO L93 Difference]: Finished difference Result 103 states and 143 transitions. [2022-03-20 21:01:37,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 21:01:37,136 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (7), 2 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 39 [2022-03-20 21:01:37,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:01:37,140 INFO L225 Difference]: With dead ends: 103 [2022-03-20 21:01:37,141 INFO L226 Difference]: Without dead ends: 96 [2022-03-20 21:01:37,142 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-03-20 21:01:37,151 INFO L913 BasicCegarLoop]: 51 mSDtfsCounter, 58 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 21:01:37,151 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 288 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 21:01:37,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-03-20 21:01:37,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2022-03-20 21:01:37,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 47 states have (on average 1.2553191489361701) internal successors, (59), 48 states have internal predecessors, (59), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-20 21:01:37,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 95 transitions. [2022-03-20 21:01:37,184 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 95 transitions. Word has length 39 [2022-03-20 21:01:37,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:01:37,185 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 95 transitions. [2022-03-20 21:01:37,185 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 21:01:37,185 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 95 transitions. [2022-03-20 21:01:37,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-20 21:01:37,188 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:01:37,188 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2022-03-20 21:01:37,209 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-03-20 21:01:37,403 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 [2022-03-20 21:01:37,404 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:01:37,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:01:37,405 INFO L85 PathProgramCache]: Analyzing trace with hash -974923140, now seen corresponding path program 1 times [2022-03-20 21:01:37,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:01:37,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [220880616] [2022-03-20 21:01:37,406 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:01:37,406 INFO L85 PathProgramCache]: Analyzing trace with hash -974923140, now seen corresponding path program 2 times [2022-03-20 21:01:37,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:01:37,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441892855] [2022-03-20 21:01:37,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:01:37,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:01:37,424 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:01:37,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [842105721] [2022-03-20 21:01:37,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 21:01:37,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:01:37,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:01:37,426 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) [2022-03-20 21:01:37,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 21:01:37,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 21:01:37,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:01:37,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-20 21:01:37,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:01:37,869 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 21:01:37,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:01:38,127 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 21:01:38,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:01:38,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441892855] [2022-03-20 21:01:38,128 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:01:38,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842105721] [2022-03-20 21:01:38,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842105721] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:01:38,128 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:01:38,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 18 [2022-03-20 21:01:38,129 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:01:38,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [220880616] [2022-03-20 21:01:38,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [220880616] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:01:38,129 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:01:38,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 21:01:38,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708475456] [2022-03-20 21:01:38,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:01:38,130 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 21:01:38,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:01:38,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 21:01:38,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2022-03-20 21:01:38,130 INFO L87 Difference]: Start difference. First operand 71 states and 95 transitions. Second operand has 13 states, 12 states have (on average 2.0) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-20 21:01:38,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:01:38,502 INFO L93 Difference]: Finished difference Result 112 states and 151 transitions. [2022-03-20 21:01:38,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 21:01:38,503 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 42 [2022-03-20 21:01:38,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:01:38,504 INFO L225 Difference]: With dead ends: 112 [2022-03-20 21:01:38,504 INFO L226 Difference]: Without dead ends: 110 [2022-03-20 21:01:38,505 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2022-03-20 21:01:38,505 INFO L913 BasicCegarLoop]: 52 mSDtfsCounter, 63 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 21:01:38,506 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 389 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 21:01:38,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-03-20 21:01:38,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 93. [2022-03-20 21:01:38,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 63 states have (on average 1.2380952380952381) internal successors, (78), 64 states have internal predecessors, (78), 23 states have call successors, (23), 7 states have call predecessors, (23), 6 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-03-20 21:01:38,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 122 transitions. [2022-03-20 21:01:38,536 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 122 transitions. Word has length 42 [2022-03-20 21:01:38,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:01:38,538 INFO L478 AbstractCegarLoop]: Abstraction has 93 states and 122 transitions. [2022-03-20 21:01:38,538 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-20 21:01:38,538 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 122 transitions. [2022-03-20 21:01:38,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-20 21:01:38,542 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:01:38,542 INFO L499 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, 1, 1, 1] [2022-03-20 21:01:38,568 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 21:01:38,757 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 [2022-03-20 21:01:38,758 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:01:38,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:01:38,758 INFO L85 PathProgramCache]: Analyzing trace with hash 81990170, now seen corresponding path program 1 times [2022-03-20 21:01:38,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:01:38,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1618634167] [2022-03-20 21:01:38,759 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:01:38,759 INFO L85 PathProgramCache]: Analyzing trace with hash 81990170, now seen corresponding path program 2 times [2022-03-20 21:01:38,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:01:38,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008029663] [2022-03-20 21:01:38,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:01:38,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:01:38,774 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:01:38,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1414742576] [2022-03-20 21:01:38,775 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 21:01:38,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:01:38,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:01:38,777 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) [2022-03-20 21:01:38,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 21:01:38,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 21:01:38,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:01:38,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-20 21:01:38,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:01:38,998 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-03-20 21:01:38,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:01:39,100 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-20 21:01:39,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:01:39,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008029663] [2022-03-20 21:01:39,101 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:01:39,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414742576] [2022-03-20 21:01:39,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414742576] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 21:01:39,101 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 21:01:39,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-03-20 21:01:39,101 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:01:39,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1618634167] [2022-03-20 21:01:39,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1618634167] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:01:39,102 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:01:39,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 21:01:39,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278150029] [2022-03-20 21:01:39,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:01:39,103 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 21:01:39,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:01:39,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 21:01:39,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-03-20 21:01:39,103 INFO L87 Difference]: Start difference. First operand 93 states and 122 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (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) [2022-03-20 21:01:39,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:01:39,163 INFO L93 Difference]: Finished difference Result 130 states and 179 transitions. [2022-03-20 21:01:39,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 21:01:39,164 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (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 47 [2022-03-20 21:01:39,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:01:39,168 INFO L225 Difference]: With dead ends: 130 [2022-03-20 21:01:39,168 INFO L226 Difference]: Without dead ends: 128 [2022-03-20 21:01:39,169 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-03-20 21:01:39,170 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 8 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 21:01:39,171 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 150 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 21:01:39,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-03-20 21:01:39,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 123. [2022-03-20 21:01:39,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 76 states have (on average 1.263157894736842) internal successors, (96), 77 states have internal predecessors, (96), 39 states have call successors, (39), 8 states have call predecessors, (39), 7 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2022-03-20 21:01:39,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 172 transitions. [2022-03-20 21:01:39,209 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 172 transitions. Word has length 47 [2022-03-20 21:01:39,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:01:39,210 INFO L478 AbstractCegarLoop]: Abstraction has 123 states and 172 transitions. [2022-03-20 21:01:39,210 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (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) [2022-03-20 21:01:39,210 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 172 transitions. [2022-03-20 21:01:39,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-20 21:01:39,211 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:01:39,211 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:01:39,236 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 21:01:39,434 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 [2022-03-20 21:01:39,434 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:01:39,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:01:39,434 INFO L85 PathProgramCache]: Analyzing trace with hash 1524769911, now seen corresponding path program 1 times [2022-03-20 21:01:39,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:01:39,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1616236125] [2022-03-20 21:01:39,435 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:01:39,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1524769911, now seen corresponding path program 2 times [2022-03-20 21:01:39,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:01:39,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452126589] [2022-03-20 21:01:39,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:01:39,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:01:39,451 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:01:39,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2036124219] [2022-03-20 21:01:39,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 21:01:39,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:01:39,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:01:39,463 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) [2022-03-20 21:01:39,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 21:01:39,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 21:01:39,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:01:39,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-20 21:01:39,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:01:39,754 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 21:01:39,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:01:39,880 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 21:01:39,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:01:39,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452126589] [2022-03-20 21:01:39,881 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:01:39,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036124219] [2022-03-20 21:01:39,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036124219] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:01:39,881 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:01:39,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2022-03-20 21:01:39,881 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:01:39,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1616236125] [2022-03-20 21:01:39,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1616236125] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:01:39,882 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:01:39,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 21:01:39,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104594512] [2022-03-20 21:01:39,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:01:39,882 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 21:01:39,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:01:39,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 21:01:39,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-03-20 21:01:39,883 INFO L87 Difference]: Start difference. First operand 123 states and 172 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 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) [2022-03-20 21:01:40,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:01:40,028 INFO L93 Difference]: Finished difference Result 137 states and 184 transitions. [2022-03-20 21:01:40,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 21:01:40,028 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), 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 47 [2022-03-20 21:01:40,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:01:40,030 INFO L225 Difference]: With dead ends: 137 [2022-03-20 21:01:40,030 INFO L226 Difference]: Without dead ends: 135 [2022-03-20 21:01:40,031 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-03-20 21:01:40,033 INFO L913 BasicCegarLoop]: 51 mSDtfsCounter, 36 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 21:01:40,033 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 256 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 21:01:40,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-03-20 21:01:40,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 131. [2022-03-20 21:01:40,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 82 states have (on average 1.2439024390243902) internal successors, (102), 83 states have internal predecessors, (102), 39 states have call successors, (39), 10 states have call predecessors, (39), 9 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2022-03-20 21:01:40,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 178 transitions. [2022-03-20 21:01:40,070 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 178 transitions. Word has length 47 [2022-03-20 21:01:40,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:01:40,072 INFO L478 AbstractCegarLoop]: Abstraction has 131 states and 178 transitions. [2022-03-20 21:01:40,072 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), 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) [2022-03-20 21:01:40,072 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 178 transitions. [2022-03-20 21:01:40,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-20 21:01:40,075 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:01:40,075 INFO L499 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2022-03-20 21:01:40,098 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-20 21:01:40,291 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 [2022-03-20 21:01:40,292 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:01:40,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:01:40,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1836145722, now seen corresponding path program 3 times [2022-03-20 21:01:40,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:01:40,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2080380061] [2022-03-20 21:01:40,293 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:01:40,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1836145722, now seen corresponding path program 4 times [2022-03-20 21:01:40,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:01:40,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632367841] [2022-03-20 21:01:40,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:01:40,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:01:40,304 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:01:40,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [940651553] [2022-03-20 21:01:40,304 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 21:01:40,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:01:40,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:01:40,306 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) [2022-03-20 21:01:40,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 21:01:40,348 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 21:01:40,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:01:40,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-20 21:01:40,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:01:40,422 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 21:01:40,422 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 21:01:40,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:01:40,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632367841] [2022-03-20 21:01:40,422 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:01:40,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940651553] [2022-03-20 21:01:40,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940651553] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:01:40,423 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:01:40,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 21:01:40,423 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:01:40,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2080380061] [2022-03-20 21:01:40,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2080380061] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:01:40,423 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:01:40,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 21:01:40,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796363666] [2022-03-20 21:01:40,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:01:40,425 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 21:01:40,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:01:40,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 21:01:40,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 21:01:40,425 INFO L87 Difference]: Start difference. First operand 131 states and 178 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 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) [2022-03-20 21:01:40,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:01:40,490 INFO L93 Difference]: Finished difference Result 170 states and 230 transitions. [2022-03-20 21:01:40,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 21:01:40,490 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 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 47 [2022-03-20 21:01:40,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:01:40,492 INFO L225 Difference]: With dead ends: 170 [2022-03-20 21:01:40,492 INFO L226 Difference]: Without dead ends: 114 [2022-03-20 21:01:40,495 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-03-20 21:01:40,496 INFO L913 BasicCegarLoop]: 57 mSDtfsCounter, 18 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 21:01:40,496 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 180 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 21:01:40,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-03-20 21:01:40,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 106. [2022-03-20 21:01:40,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 65 states have (on average 1.1846153846153846) internal successors, (77), 66 states have internal predecessors, (77), 31 states have call successors, (31), 10 states have call predecessors, (31), 9 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2022-03-20 21:01:40,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 137 transitions. [2022-03-20 21:01:40,515 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 137 transitions. Word has length 47 [2022-03-20 21:01:40,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:01:40,515 INFO L478 AbstractCegarLoop]: Abstraction has 106 states and 137 transitions. [2022-03-20 21:01:40,515 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 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) [2022-03-20 21:01:40,515 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 137 transitions. [2022-03-20 21:01:40,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-03-20 21:01:40,516 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:01:40,516 INFO L499 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, 1, 1, 1] [2022-03-20 21:01:40,540 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-20 21:01:40,739 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 [2022-03-20 21:01:40,740 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:01:40,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:01:40,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1952108775, now seen corresponding path program 1 times [2022-03-20 21:01:40,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:01:40,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [189321757] [2022-03-20 21:01:40,741 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:01:40,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1952108775, now seen corresponding path program 2 times [2022-03-20 21:01:40,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:01:40,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370133610] [2022-03-20 21:01:40,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:01:40,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:01:40,751 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:01:40,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [432740367] [2022-03-20 21:01:40,751 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 21:01:40,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:01:40,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:01:40,753 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) [2022-03-20 21:01:40,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 21:01:40,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 21:01:40,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:01:40,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 21:01:40,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:01:40,897 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-20 21:01:40,898 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 21:01:40,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:01:40,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370133610] [2022-03-20 21:01:40,898 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:01:40,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432740367] [2022-03-20 21:01:40,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432740367] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:01:40,898 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:01:40,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 21:01:40,899 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:01:40,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [189321757] [2022-03-20 21:01:40,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [189321757] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:01:40,899 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:01:40,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 21:01:40,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567970632] [2022-03-20 21:01:40,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:01:40,899 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 21:01:40,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:01:40,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 21:01:40,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 21:01:40,900 INFO L87 Difference]: Start difference. First operand 106 states and 137 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-20 21:01:40,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:01:40,958 INFO L93 Difference]: Finished difference Result 158 states and 221 transitions. [2022-03-20 21:01:40,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 21:01:40,959 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 52 [2022-03-20 21:01:40,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:01:40,960 INFO L225 Difference]: With dead ends: 158 [2022-03-20 21:01:40,960 INFO L226 Difference]: Without dead ends: 156 [2022-03-20 21:01:40,961 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 21:01:40,961 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 9 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 21:01:40,961 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 162 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 21:01:40,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-03-20 21:01:40,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 140. [2022-03-20 21:01:40,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 74 states have (on average 1.162162162162162) internal successors, (86), 81 states have internal predecessors, (86), 55 states have call successors, (55), 11 states have call predecessors, (55), 10 states have return successors, (53), 47 states have call predecessors, (53), 53 states have call successors, (53) [2022-03-20 21:01:40,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 194 transitions. [2022-03-20 21:01:40,984 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 194 transitions. Word has length 52 [2022-03-20 21:01:40,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:01:40,987 INFO L478 AbstractCegarLoop]: Abstraction has 140 states and 194 transitions. [2022-03-20 21:01:40,987 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-20 21:01:40,987 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 194 transitions. [2022-03-20 21:01:40,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-03-20 21:01:40,988 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:01:40,988 INFO L499 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:01:41,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-20 21:01:41,203 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 [2022-03-20 21:01:41,204 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:01:41,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:01:41,204 INFO L85 PathProgramCache]: Analyzing trace with hash 188363668, now seen corresponding path program 1 times [2022-03-20 21:01:41,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:01:41,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1378087794] [2022-03-20 21:01:41,205 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:01:41,205 INFO L85 PathProgramCache]: Analyzing trace with hash 188363668, now seen corresponding path program 2 times [2022-03-20 21:01:41,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:01:41,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746376363] [2022-03-20 21:01:41,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:01:41,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:01:41,227 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:01:41,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1512189115] [2022-03-20 21:01:41,227 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 21:01:41,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:01:41,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:01:41,228 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) [2022-03-20 21:01:41,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-20 21:01:41,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 21:01:41,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:01:41,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 57 conjunts are in the unsatisfiable core [2022-03-20 21:01:41,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:01:41,832 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-20 21:01:41,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:01:42,952 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-20 21:01:42,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:01:42,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746376363] [2022-03-20 21:01:42,953 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:01:42,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512189115] [2022-03-20 21:01:42,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512189115] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:01:42,953 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:01:42,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2022-03-20 21:01:42,954 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:01:42,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1378087794] [2022-03-20 21:01:42,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1378087794] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:01:42,954 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:01:42,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 21:01:42,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527505391] [2022-03-20 21:01:42,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:01:42,955 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 21:01:42,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:01:42,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 21:01:42,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-03-20 21:01:42,955 INFO L87 Difference]: Start difference. First operand 140 states and 194 transitions. Second operand has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-20 21:01:43,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:01:43,397 INFO L93 Difference]: Finished difference Result 200 states and 283 transitions. [2022-03-20 21:01:43,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 21:01:43,399 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 64 [2022-03-20 21:01:43,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:01:43,402 INFO L225 Difference]: With dead ends: 200 [2022-03-20 21:01:43,402 INFO L226 Difference]: Without dead ends: 197 [2022-03-20 21:01:43,403 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 107 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2022-03-20 21:01:43,405 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 54 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 21:01:43,405 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 385 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 21:01:43,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-03-20 21:01:43,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 193. [2022-03-20 21:01:43,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 101 states have (on average 1.1782178217821782) internal successors, (119), 110 states have internal predecessors, (119), 79 states have call successors, (79), 13 states have call predecessors, (79), 12 states have return successors, (77), 69 states have call predecessors, (77), 77 states have call successors, (77) [2022-03-20 21:01:43,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 275 transitions. [2022-03-20 21:01:43,444 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 275 transitions. Word has length 64 [2022-03-20 21:01:43,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:01:43,445 INFO L478 AbstractCegarLoop]: Abstraction has 193 states and 275 transitions. [2022-03-20 21:01:43,445 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-20 21:01:43,445 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 275 transitions. [2022-03-20 21:01:43,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-20 21:01:43,446 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:01:43,446 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:01:43,472 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-20 21:01:43,667 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 [2022-03-20 21:01:43,668 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:01:43,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:01:43,668 INFO L85 PathProgramCache]: Analyzing trace with hash -368004398, now seen corresponding path program 3 times [2022-03-20 21:01:43,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:01:43,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [116802359] [2022-03-20 21:01:43,669 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:01:43,669 INFO L85 PathProgramCache]: Analyzing trace with hash -368004398, now seen corresponding path program 4 times [2022-03-20 21:01:43,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:01:43,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693006365] [2022-03-20 21:01:43,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:01:43,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:01:43,678 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:01:43,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1799659674] [2022-03-20 21:01:43,679 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 21:01:43,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:01:43,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:01:43,680 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) [2022-03-20 21:01:43,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-20 21:01:43,725 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 21:01:43,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:01:43,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-20 21:01:43,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:01:43,867 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-03-20 21:01:43,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:01:43,991 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-03-20 21:01:43,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:01:43,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693006365] [2022-03-20 21:01:43,992 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:01:43,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799659674] [2022-03-20 21:01:43,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799659674] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:01:43,992 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:01:43,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2022-03-20 21:01:43,993 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:01:43,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [116802359] [2022-03-20 21:01:43,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [116802359] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:01:43,993 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:01:43,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 21:01:43,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745582294] [2022-03-20 21:01:43,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:01:43,993 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 21:01:43,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:01:43,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 21:01:43,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-03-20 21:01:43,994 INFO L87 Difference]: Start difference. First operand 193 states and 275 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 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) [2022-03-20 21:01:44,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:01:44,289 INFO L93 Difference]: Finished difference Result 288 states and 424 transitions. [2022-03-20 21:01:44,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 21:01:44,295 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 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 69 [2022-03-20 21:01:44,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:01:44,302 INFO L225 Difference]: With dead ends: 288 [2022-03-20 21:01:44,302 INFO L226 Difference]: Without dead ends: 281 [2022-03-20 21:01:44,302 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 134 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2022-03-20 21:01:44,303 INFO L913 BasicCegarLoop]: 87 mSDtfsCounter, 48 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 21:01:44,304 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 394 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 21:01:44,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2022-03-20 21:01:44,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 208. [2022-03-20 21:01:44,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 116 states have (on average 1.206896551724138) internal successors, (140), 122 states have internal predecessors, (140), 79 states have call successors, (79), 13 states have call predecessors, (79), 12 states have return successors, (77), 72 states have call predecessors, (77), 77 states have call successors, (77) [2022-03-20 21:01:44,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 296 transitions. [2022-03-20 21:01:44,346 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 296 transitions. Word has length 69 [2022-03-20 21:01:44,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:01:44,347 INFO L478 AbstractCegarLoop]: Abstraction has 208 states and 296 transitions. [2022-03-20 21:01:44,348 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 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) [2022-03-20 21:01:44,348 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 296 transitions. [2022-03-20 21:01:44,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-03-20 21:01:44,349 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:01:44,349 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 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, 1, 1] [2022-03-20 21:01:44,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-20 21:01:44,568 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 [2022-03-20 21:01:44,568 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:01:44,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:01:44,569 INFO L85 PathProgramCache]: Analyzing trace with hash -298771846, now seen corresponding path program 1 times [2022-03-20 21:01:44,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:01:44,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1784929638] [2022-03-20 21:01:44,569 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:01:44,569 INFO L85 PathProgramCache]: Analyzing trace with hash -298771846, now seen corresponding path program 2 times [2022-03-20 21:01:44,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:01:44,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884243331] [2022-03-20 21:01:44,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:01:44,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:01:44,578 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:01:44,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [925296928] [2022-03-20 21:01:44,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 21:01:44,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:01:44,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:01:44,587 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) [2022-03-20 21:01:44,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-20 21:01:44,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 21:01:44,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:01:44,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-20 21:01:44,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:01:45,049 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 14 proven. 17 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-03-20 21:01:45,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:01:45,267 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-03-20 21:01:45,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:01:45,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884243331] [2022-03-20 21:01:45,268 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:01:45,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925296928] [2022-03-20 21:01:45,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925296928] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 21:01:45,268 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 21:01:45,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [12] total 14 [2022-03-20 21:01:45,268 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:01:45,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1784929638] [2022-03-20 21:01:45,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1784929638] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:01:45,269 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:01:45,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 21:01:45,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698264708] [2022-03-20 21:01:45,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:01:45,270 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 21:01:45,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:01:45,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 21:01:45,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2022-03-20 21:01:45,270 INFO L87 Difference]: Start difference. First operand 208 states and 296 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-03-20 21:01:45,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:01:45,348 INFO L93 Difference]: Finished difference Result 214 states and 301 transitions. [2022-03-20 21:01:45,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 21:01:45,348 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 74 [2022-03-20 21:01:45,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:01:45,350 INFO L225 Difference]: With dead ends: 214 [2022-03-20 21:01:45,350 INFO L226 Difference]: Without dead ends: 212 [2022-03-20 21:01:45,351 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 134 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2022-03-20 21:01:45,351 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 13 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 21:01:45,351 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 145 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 21:01:45,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-03-20 21:01:45,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2022-03-20 21:01:45,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 119 states have (on average 1.2016806722689075) internal successors, (143), 125 states have internal predecessors, (143), 79 states have call successors, (79), 14 states have call predecessors, (79), 13 states have return successors, (77), 72 states have call predecessors, (77), 77 states have call successors, (77) [2022-03-20 21:01:45,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 299 transitions. [2022-03-20 21:01:45,390 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 299 transitions. Word has length 74 [2022-03-20 21:01:45,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:01:45,391 INFO L478 AbstractCegarLoop]: Abstraction has 212 states and 299 transitions. [2022-03-20 21:01:45,391 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-03-20 21:01:45,391 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 299 transitions. [2022-03-20 21:01:45,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-03-20 21:01:45,392 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:01:45,392 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:01:45,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-20 21:01:45,605 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 [2022-03-20 21:01:45,606 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:01:45,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:01:45,606 INFO L85 PathProgramCache]: Analyzing trace with hash -2089538094, now seen corresponding path program 1 times [2022-03-20 21:01:45,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:01:45,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [830617239] [2022-03-20 21:01:45,606 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:01:45,607 INFO L85 PathProgramCache]: Analyzing trace with hash -2089538094, now seen corresponding path program 2 times [2022-03-20 21:01:45,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:01:45,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375507749] [2022-03-20 21:01:45,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:01:45,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:01:45,615 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:01:45,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [713101627] [2022-03-20 21:01:45,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 21:01:45,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:01:45,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:01:45,617 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) [2022-03-20 21:01:45,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-20 21:01:45,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 21:01:45,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:01:45,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-20 21:01:45,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:01:45,810 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-03-20 21:01:45,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:01:45,958 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-03-20 21:01:45,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:01:45,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375507749] [2022-03-20 21:01:45,958 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:01:45,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713101627] [2022-03-20 21:01:45,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713101627] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:01:45,959 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:01:45,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-03-20 21:01:45,959 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:01:45,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [830617239] [2022-03-20 21:01:45,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [830617239] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:01:45,959 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:01:45,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 21:01:45,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20390008] [2022-03-20 21:01:45,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:01:45,960 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 21:01:45,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:01:45,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 21:01:45,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-03-20 21:01:45,960 INFO L87 Difference]: Start difference. First operand 212 states and 299 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-20 21:01:46,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:01:46,180 INFO L93 Difference]: Finished difference Result 226 states and 310 transitions. [2022-03-20 21:01:46,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 21:01:46,180 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 72 [2022-03-20 21:01:46,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:01:46,182 INFO L225 Difference]: With dead ends: 226 [2022-03-20 21:01:46,182 INFO L226 Difference]: Without dead ends: 224 [2022-03-20 21:01:46,182 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-03-20 21:01:46,183 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 21 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 21:01:46,183 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 196 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 21:01:46,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-03-20 21:01:46,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 224. [2022-03-20 21:01:46,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 128 states have (on average 1.1875) internal successors, (152), 134 states have internal predecessors, (152), 79 states have call successors, (79), 17 states have call predecessors, (79), 16 states have return successors, (77), 72 states have call predecessors, (77), 77 states have call successors, (77) [2022-03-20 21:01:46,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 308 transitions. [2022-03-20 21:01:46,240 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 308 transitions. Word has length 72 [2022-03-20 21:01:46,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:01:46,240 INFO L478 AbstractCegarLoop]: Abstraction has 224 states and 308 transitions. [2022-03-20 21:01:46,240 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-20 21:01:46,240 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 308 transitions. [2022-03-20 21:01:46,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-03-20 21:01:46,243 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:01:46,243 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:01:46,269 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-20 21:01:46,466 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 [2022-03-20 21:01:46,466 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:01:46,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:01:46,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1984914564, now seen corresponding path program 3 times [2022-03-20 21:01:46,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:01:46,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1000415666] [2022-03-20 21:01:46,467 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:01:46,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1984914564, now seen corresponding path program 4 times [2022-03-20 21:01:46,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:01:46,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388559119] [2022-03-20 21:01:46,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:01:46,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:01:46,476 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:01:46,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1531253197] [2022-03-20 21:01:46,476 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 21:01:46,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:01:46,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:01:46,477 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) [2022-03-20 21:01:46,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-20 21:01:46,519 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 21:01:46,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:01:46,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 21:01:46,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:01:46,622 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-20 21:01:46,622 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 21:01:46,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:01:46,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388559119] [2022-03-20 21:01:46,622 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:01:46,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531253197] [2022-03-20 21:01:46,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531253197] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:01:46,623 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:01:46,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 21:01:46,623 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:01:46,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1000415666] [2022-03-20 21:01:46,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1000415666] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:01:46,623 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:01:46,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 21:01:46,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951078946] [2022-03-20 21:01:46,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:01:46,625 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 21:01:46,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:01:46,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 21:01:46,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-20 21:01:46,626 INFO L87 Difference]: Start difference. First operand 224 states and 308 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, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-03-20 21:01:46,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:01:46,701 INFO L93 Difference]: Finished difference Result 367 states and 500 transitions. [2022-03-20 21:01:46,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 21:01:46,701 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, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 77 [2022-03-20 21:01:46,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:01:46,703 INFO L225 Difference]: With dead ends: 367 [2022-03-20 21:01:46,703 INFO L226 Difference]: Without dead ends: 230 [2022-03-20 21:01:46,704 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-20 21:01:46,704 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 3 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 21:01:46,704 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 148 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 21:01:46,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-03-20 21:01:46,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 214. [2022-03-20 21:01:46,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 126 states have (on average 1.1825396825396826) internal successors, (149), 127 states have internal predecessors, (149), 71 states have call successors, (71), 17 states have call predecessors, (71), 16 states have return successors, (69), 69 states have call predecessors, (69), 69 states have call successors, (69) [2022-03-20 21:01:46,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 289 transitions. [2022-03-20 21:01:46,744 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 289 transitions. Word has length 77 [2022-03-20 21:01:46,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:01:46,744 INFO L478 AbstractCegarLoop]: Abstraction has 214 states and 289 transitions. [2022-03-20 21:01:46,744 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, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-03-20 21:01:46,745 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 289 transitions. [2022-03-20 21:01:46,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-03-20 21:01:46,745 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:01:46,745 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:01:46,772 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-20 21:01:46,969 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 [2022-03-20 21:01:46,970 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:01:46,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:01:46,970 INFO L85 PathProgramCache]: Analyzing trace with hash -867272991, now seen corresponding path program 5 times [2022-03-20 21:01:46,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:01:46,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [181829353] [2022-03-20 21:01:46,971 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:01:46,971 INFO L85 PathProgramCache]: Analyzing trace with hash -867272991, now seen corresponding path program 6 times [2022-03-20 21:01:46,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:01:46,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081661127] [2022-03-20 21:01:46,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:01:46,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:01:46,980 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:01:46,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1464497042] [2022-03-20 21:01:46,980 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 21:01:46,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:01:46,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:01:46,982 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) [2022-03-20 21:01:46,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-20 21:01:47,033 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 21:01:47,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:01:47,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 65 conjunts are in the unsatisfiable core [2022-03-20 21:01:47,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:01:47,788 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 12 proven. 32 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-20 21:01:47,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:01:48,380 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 18 proven. 26 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-20 21:01:48,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:01:48,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081661127] [2022-03-20 21:01:48,381 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:01:48,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464497042] [2022-03-20 21:01:48,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464497042] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:01:48,381 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:01:48,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 24 [2022-03-20 21:01:48,381 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:01:48,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [181829353] [2022-03-20 21:01:48,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [181829353] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:01:48,382 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:01:48,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 21:01:48,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525545976] [2022-03-20 21:01:48,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:01:48,382 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 21:01:48,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:01:48,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 21:01:48,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2022-03-20 21:01:48,383 INFO L87 Difference]: Start difference. First operand 214 states and 289 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-03-20 21:01:48,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:01:48,956 INFO L93 Difference]: Finished difference Result 285 states and 377 transitions. [2022-03-20 21:01:48,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 21:01:48,957 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 77 [2022-03-20 21:01:48,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:01:48,960 INFO L225 Difference]: With dead ends: 285 [2022-03-20 21:01:48,960 INFO L226 Difference]: Without dead ends: 283 [2022-03-20 21:01:48,961 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=150, Invalid=780, Unknown=0, NotChecked=0, Total=930 [2022-03-20 21:01:48,961 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 64 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 504 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 21:01:48,961 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 504 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 604 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 21:01:48,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-03-20 21:01:49,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 265. [2022-03-20 21:01:49,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 157 states have (on average 1.178343949044586) internal successors, (185), 158 states have internal predecessors, (185), 87 states have call successors, (87), 21 states have call predecessors, (87), 20 states have return successors, (85), 85 states have call predecessors, (85), 85 states have call successors, (85) [2022-03-20 21:01:49,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 357 transitions. [2022-03-20 21:01:49,026 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 357 transitions. Word has length 77 [2022-03-20 21:01:49,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:01:49,026 INFO L478 AbstractCegarLoop]: Abstraction has 265 states and 357 transitions. [2022-03-20 21:01:49,026 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-03-20 21:01:49,026 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 357 transitions. [2022-03-20 21:01:49,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-03-20 21:01:49,028 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:01:49,028 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:01:49,044 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-03-20 21:01:49,230 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 [2022-03-20 21:01:49,230 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:01:49,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:01:49,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1679616651, now seen corresponding path program 1 times [2022-03-20 21:01:49,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:01:49,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1687089168] [2022-03-20 21:01:49,231 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:01:49,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1679616651, now seen corresponding path program 2 times [2022-03-20 21:01:49,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:01:49,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108770660] [2022-03-20 21:01:49,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:01:49,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:01:49,238 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:01:49,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [970182252] [2022-03-20 21:01:49,238 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 21:01:49,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:01:49,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:01:49,264 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) [2022-03-20 21:01:49,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-20 21:01:49,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 21:01:49,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:01:49,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 61 conjunts are in the unsatisfiable core [2022-03-20 21:01:49,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:01:49,971 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 41 proven. 21 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-03-20 21:01:49,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:01:50,732 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 36 proven. 11 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2022-03-20 21:01:50,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:01:50,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108770660] [2022-03-20 21:01:50,733 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:01:50,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970182252] [2022-03-20 21:01:50,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970182252] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:01:50,733 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:01:50,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 22 [2022-03-20 21:01:50,733 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:01:50,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1687089168] [2022-03-20 21:01:50,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1687089168] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:01:50,733 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:01:50,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 21:01:50,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280620528] [2022-03-20 21:01:50,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:01:50,734 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 21:01:50,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:01:50,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 21:01:50,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-03-20 21:01:50,734 INFO L87 Difference]: Start difference. First operand 265 states and 357 transitions. Second operand has 13 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 4 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-03-20 21:01:51,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:01:51,527 INFO L93 Difference]: Finished difference Result 348 states and 475 transitions. [2022-03-20 21:01:51,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 21:01:51,527 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 4 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 86 [2022-03-20 21:01:51,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:01:51,529 INFO L225 Difference]: With dead ends: 348 [2022-03-20 21:01:51,529 INFO L226 Difference]: Without dead ends: 345 [2022-03-20 21:01:51,530 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 148 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=139, Invalid=673, Unknown=0, NotChecked=0, Total=812 [2022-03-20 21:01:51,530 INFO L913 BasicCegarLoop]: 52 mSDtfsCounter, 56 mSDsluCounter, 434 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 21:01:51,531 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 486 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 21:01:51,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2022-03-20 21:01:51,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 330. [2022-03-20 21:01:51,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 191 states have (on average 1.193717277486911) internal successors, (228), 192 states have internal predecessors, (228), 115 states have call successors, (115), 24 states have call predecessors, (115), 23 states have return successors, (113), 113 states have call predecessors, (113), 113 states have call successors, (113) [2022-03-20 21:01:51,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 456 transitions. [2022-03-20 21:01:51,595 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 456 transitions. Word has length 86 [2022-03-20 21:01:51,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:01:51,595 INFO L478 AbstractCegarLoop]: Abstraction has 330 states and 456 transitions. [2022-03-20 21:01:51,596 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 4 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-03-20 21:01:51,596 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 456 transitions. [2022-03-20 21:01:51,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-03-20 21:01:51,597 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:01:51,597 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:01:51,620 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-20 21:01:51,811 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 [2022-03-20 21:01:51,811 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:01:51,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:01:51,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1455197645, now seen corresponding path program 3 times [2022-03-20 21:01:51,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:01:51,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1538177825] [2022-03-20 21:01:51,812 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:01:51,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1455197645, now seen corresponding path program 4 times [2022-03-20 21:01:51,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:01:51,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125528122] [2022-03-20 21:01:51,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:01:51,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:01:51,820 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:01:51,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1099243339] [2022-03-20 21:01:51,820 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 21:01:51,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:01:51,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:01:51,822 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) [2022-03-20 21:01:51,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-20 21:01:51,873 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 21:01:51,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:01:51,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 86 conjunts are in the unsatisfiable core [2022-03-20 21:01:51,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:01:53,033 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 51 proven. 32 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-03-20 21:01:53,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:02:00,214 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 61 proven. 17 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2022-03-20 21:02:00,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:02:00,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125528122] [2022-03-20 21:02:00,214 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:02:00,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099243339] [2022-03-20 21:02:00,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099243339] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:02:00,214 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:02:00,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 30 [2022-03-20 21:02:00,215 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:02:00,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1538177825] [2022-03-20 21:02:00,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1538177825] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:02:00,215 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:02:00,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-20 21:02:00,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718382769] [2022-03-20 21:02:00,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:02:00,215 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-20 21:02:00,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:02:00,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-20 21:02:00,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=728, Unknown=0, NotChecked=0, Total=870 [2022-03-20 21:02:00,216 INFO L87 Difference]: Start difference. First operand 330 states and 456 transitions. Second operand has 19 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-20 21:02:01,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:02:01,693 INFO L93 Difference]: Finished difference Result 422 states and 582 transitions. [2022-03-20 21:02:01,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 21:02:01,697 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) Word has length 91 [2022-03-20 21:02:01,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:02:01,699 INFO L225 Difference]: With dead ends: 422 [2022-03-20 21:02:01,699 INFO L226 Difference]: Without dead ends: 419 [2022-03-20 21:02:01,700 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 150 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=230, Invalid=1176, Unknown=0, NotChecked=0, Total=1406 [2022-03-20 21:02:01,700 INFO L913 BasicCegarLoop]: 59 mSDtfsCounter, 73 mSDsluCounter, 659 mSDsCounter, 0 mSdLazyCounter, 975 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 718 SdHoareTripleChecker+Invalid, 1058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 975 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-20 21:02:01,701 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 718 Invalid, 1058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 975 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-20 21:02:01,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2022-03-20 21:02:01,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 399. [2022-03-20 21:02:01,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 228 states have (on average 1.2017543859649122) internal successors, (274), 229 states have internal predecessors, (274), 143 states have call successors, (143), 28 states have call predecessors, (143), 27 states have return successors, (141), 141 states have call predecessors, (141), 141 states have call successors, (141) [2022-03-20 21:02:01,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 558 transitions. [2022-03-20 21:02:01,786 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 558 transitions. Word has length 91 [2022-03-20 21:02:01,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:02:01,788 INFO L478 AbstractCegarLoop]: Abstraction has 399 states and 558 transitions. [2022-03-20 21:02:01,788 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-20 21:02:01,788 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 558 transitions. [2022-03-20 21:02:01,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-20 21:02:01,790 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:02:01,790 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 9, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:02:01,816 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-20 21:02:02,011 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 [2022-03-20 21:02:02,011 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:02:02,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:02:02,012 INFO L85 PathProgramCache]: Analyzing trace with hash -100199667, now seen corresponding path program 7 times [2022-03-20 21:02:02,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:02:02,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1021700419] [2022-03-20 21:02:02,012 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:02:02,012 INFO L85 PathProgramCache]: Analyzing trace with hash -100199667, now seen corresponding path program 8 times [2022-03-20 21:02:02,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:02:02,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142932332] [2022-03-20 21:02:02,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:02:02,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:02:02,019 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:02:02,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [468608200] [2022-03-20 21:02:02,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 21:02:02,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:02:02,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:02:02,021 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) [2022-03-20 21:02:02,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-20 21:02:02,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 21:02:02,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:02:02,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 96 conjunts are in the unsatisfiable core [2022-03-20 21:02:02,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:02:02,416 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:02:02,928 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:02:03,017 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 37 proven. 81 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-03-20 21:02:03,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:02:03,648 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 78 proven. 18 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2022-03-20 21:02:03,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:02:03,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142932332] [2022-03-20 21:02:03,648 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:02:03,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468608200] [2022-03-20 21:02:03,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468608200] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:02:03,649 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:02:03,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 12] total 26 [2022-03-20 21:02:03,649 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:02:03,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1021700419] [2022-03-20 21:02:03,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1021700419] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:02:03,649 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:02:03,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-20 21:02:03,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11696974] [2022-03-20 21:02:03,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:02:03,650 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-20 21:02:03,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:02:03,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-20 21:02:03,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2022-03-20 21:02:03,650 INFO L87 Difference]: Start difference. First operand 399 states and 558 transitions. Second operand has 19 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 8 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 7 states have call successors, (14) [2022-03-20 21:02:04,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:02:04,428 INFO L93 Difference]: Finished difference Result 474 states and 649 transitions. [2022-03-20 21:02:04,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 21:02:04,429 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 8 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 7 states have call successors, (14) Word has length 102 [2022-03-20 21:02:04,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:02:04,432 INFO L225 Difference]: With dead ends: 474 [2022-03-20 21:02:04,433 INFO L226 Difference]: Without dead ends: 472 [2022-03-20 21:02:04,433 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 176 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=146, Invalid=784, Unknown=0, NotChecked=0, Total=930 [2022-03-20 21:02:04,434 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 71 mSDsluCounter, 501 mSDsCounter, 0 mSdLazyCounter, 746 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 808 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 746 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 21:02:04,434 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 550 Invalid, 808 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 746 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 21:02:04,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2022-03-20 21:02:04,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 454. [2022-03-20 21:02:04,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 262 states have (on average 1.1946564885496183) internal successors, (313), 263 states have internal predecessors, (313), 159 states have call successors, (159), 33 states have call predecessors, (159), 32 states have return successors, (157), 157 states have call predecessors, (157), 157 states have call successors, (157) [2022-03-20 21:02:04,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 629 transitions. [2022-03-20 21:02:04,547 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 629 transitions. Word has length 102 [2022-03-20 21:02:04,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:02:04,548 INFO L478 AbstractCegarLoop]: Abstraction has 454 states and 629 transitions. [2022-03-20 21:02:04,548 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 8 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 7 states have call successors, (14) [2022-03-20 21:02:04,548 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 629 transitions. [2022-03-20 21:02:04,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-03-20 21:02:04,549 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:02:04,549 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:02:04,576 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-20 21:02:04,771 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 [2022-03-20 21:02:04,771 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:02:04,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:02:04,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1948981098, now seen corresponding path program 5 times [2022-03-20 21:02:04,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:02:04,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1848188295] [2022-03-20 21:02:04,772 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:02:04,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1948981098, now seen corresponding path program 6 times [2022-03-20 21:02:04,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:02:04,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564314017] [2022-03-20 21:02:04,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:02:04,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:02:04,779 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:02:04,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [283628987] [2022-03-20 21:02:04,780 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 21:02:04,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:02:04,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:02:04,791 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) [2022-03-20 21:02:04,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-20 21:02:04,849 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 21:02:04,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:02:04,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 58 conjunts are in the unsatisfiable core [2022-03-20 21:02:04,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:02:05,371 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:02:05,499 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 57 proven. 33 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2022-03-20 21:02:05,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:02:05,734 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:02:57,809 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:03:08,198 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:03:30,381 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:03:40,443 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:05:56,016 WARN L855 $PredicateComparison]: unable to prove that (and (not (= |c___VERIFIER_assert_#in~cond| 0)) (or (not (= |c___VERIFIER_assert_#in~cond| 1)) (forall ((v_main_~d~0_BEFORE_CALL_76 Int) (v_main_~y~0_BEFORE_CALL_104 Int) (v_main_~x~0_BEFORE_CALL_105 Int) (v_main_~p~0_BEFORE_CALL_83 Int) (v_main_~k~0_BEFORE_CALL_78 Int) (v_main_~r~0_BEFORE_CALL_83 Int) (v_main_~s~0_BEFORE_CALL_91 Int) (v_main_~q~0_BEFORE_CALL_93 Int) (v_main_~b~0_BEFORE_CALL_114 Int)) (let ((.cse0 (* v_main_~d~0_BEFORE_CALL_76 v_main_~b~0_BEFORE_CALL_114))) (or (= (mod .cse0 v_main_~b~0_BEFORE_CALL_114) 0) (= (+ (* v_main_~y~0_BEFORE_CALL_104 v_main_~k~0_BEFORE_CALL_78 v_main_~s~0_BEFORE_CALL_91) (* v_main_~y~0_BEFORE_CALL_104 v_main_~s~0_BEFORE_CALL_91) (* v_main_~d~0_BEFORE_CALL_76 v_main_~y~0_BEFORE_CALL_104 v_main_~s~0_BEFORE_CALL_91) (* v_main_~q~0_BEFORE_CALL_93 v_main_~x~0_BEFORE_CALL_105 v_main_~k~0_BEFORE_CALL_78) (* v_main_~q~0_BEFORE_CALL_93 v_main_~d~0_BEFORE_CALL_76 v_main_~x~0_BEFORE_CALL_105) (* v_main_~q~0_BEFORE_CALL_93 v_main_~x~0_BEFORE_CALL_105)) (+ (* v_main_~r~0_BEFORE_CALL_83 v_main_~y~0_BEFORE_CALL_104) (* v_main_~p~0_BEFORE_CALL_83 v_main_~x~0_BEFORE_CALL_105) v_main_~b~0_BEFORE_CALL_114)) (<= .cse0 0)))))) is different from true [2022-03-20 21:06:30,119 WARN L855 $PredicateComparison]: unable to prove that (or (and (not (= |c___VERIFIER_assert_#in~cond| 0)) (or (not (= |c___VERIFIER_assert_#in~cond| 1)) (forall ((v_main_~d~0_BEFORE_CALL_76 Int) (v_main_~y~0_BEFORE_CALL_104 Int) (v_main_~x~0_BEFORE_CALL_105 Int) (v_main_~p~0_BEFORE_CALL_83 Int) (v_main_~k~0_BEFORE_CALL_78 Int) (v_main_~r~0_BEFORE_CALL_83 Int) (v_main_~s~0_BEFORE_CALL_91 Int) (v_main_~q~0_BEFORE_CALL_93 Int) (v_main_~b~0_BEFORE_CALL_114 Int)) (let ((.cse0 (* v_main_~d~0_BEFORE_CALL_76 v_main_~b~0_BEFORE_CALL_114))) (or (= (mod .cse0 v_main_~b~0_BEFORE_CALL_114) 0) (= (+ (* v_main_~y~0_BEFORE_CALL_104 v_main_~k~0_BEFORE_CALL_78 v_main_~s~0_BEFORE_CALL_91) (* v_main_~y~0_BEFORE_CALL_104 v_main_~s~0_BEFORE_CALL_91) (* v_main_~d~0_BEFORE_CALL_76 v_main_~y~0_BEFORE_CALL_104 v_main_~s~0_BEFORE_CALL_91) (* v_main_~q~0_BEFORE_CALL_93 v_main_~x~0_BEFORE_CALL_105 v_main_~k~0_BEFORE_CALL_78) (* v_main_~q~0_BEFORE_CALL_93 v_main_~d~0_BEFORE_CALL_76 v_main_~x~0_BEFORE_CALL_105) (* v_main_~q~0_BEFORE_CALL_93 v_main_~x~0_BEFORE_CALL_105)) (+ (* v_main_~r~0_BEFORE_CALL_83 v_main_~y~0_BEFORE_CALL_104) (* v_main_~p~0_BEFORE_CALL_83 v_main_~x~0_BEFORE_CALL_105) v_main_~b~0_BEFORE_CALL_114)) (<= .cse0 0)))))) (= c___VERIFIER_assert_~cond 0)) is different from true [2022-03-20 21:06:48,168 WARN L855 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 1)) (forall ((v_main_~d~0_BEFORE_CALL_76 Int) (v_main_~y~0_BEFORE_CALL_104 Int) (v_main_~x~0_BEFORE_CALL_105 Int) (v_main_~p~0_BEFORE_CALL_83 Int) (v_main_~k~0_BEFORE_CALL_78 Int) (v_main_~r~0_BEFORE_CALL_83 Int) (v_main_~s~0_BEFORE_CALL_91 Int) (v_main_~q~0_BEFORE_CALL_93 Int) (v_main_~b~0_BEFORE_CALL_114 Int)) (let ((.cse0 (* v_main_~d~0_BEFORE_CALL_76 v_main_~b~0_BEFORE_CALL_114))) (or (= (mod .cse0 v_main_~b~0_BEFORE_CALL_114) 0) (= (+ (* v_main_~y~0_BEFORE_CALL_104 v_main_~k~0_BEFORE_CALL_78 v_main_~s~0_BEFORE_CALL_91) (* v_main_~y~0_BEFORE_CALL_104 v_main_~s~0_BEFORE_CALL_91) (* v_main_~d~0_BEFORE_CALL_76 v_main_~y~0_BEFORE_CALL_104 v_main_~s~0_BEFORE_CALL_91) (* v_main_~q~0_BEFORE_CALL_93 v_main_~x~0_BEFORE_CALL_105 v_main_~k~0_BEFORE_CALL_78) (* v_main_~q~0_BEFORE_CALL_93 v_main_~d~0_BEFORE_CALL_76 v_main_~x~0_BEFORE_CALL_105) (* v_main_~q~0_BEFORE_CALL_93 v_main_~x~0_BEFORE_CALL_105)) (+ (* v_main_~r~0_BEFORE_CALL_83 v_main_~y~0_BEFORE_CALL_104) (* v_main_~p~0_BEFORE_CALL_83 v_main_~x~0_BEFORE_CALL_105) v_main_~b~0_BEFORE_CALL_114)) (<= .cse0 0))))) is different from true [2022-03-20 21:06:49,364 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 71 proven. 34 refuted. 0 times theorem prover too weak. 224 trivial. 5 not checked. [2022-03-20 21:06:49,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:06:49,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564314017] [2022-03-20 21:06:49,365 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:06:49,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283628987] [2022-03-20 21:06:49,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283628987] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:06:49,365 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:06:49,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17] total 25 [2022-03-20 21:06:49,365 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:06:49,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1848188295] [2022-03-20 21:06:49,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1848188295] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:06:49,365 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:06:49,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 21:06:49,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247433547] [2022-03-20 21:06:49,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:06:49,366 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 21:06:49,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:49,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 21:06:49,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=390, Unknown=3, NotChecked=126, Total=600 [2022-03-20 21:06:49,367 INFO L87 Difference]: Start difference. First operand 454 states and 629 transitions. Second operand has 13 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2022-03-20 21:06:50,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:06:50,046 INFO L93 Difference]: Finished difference Result 530 states and 735 transitions. [2022-03-20 21:06:50,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 21:06:50,046 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) Word has length 108 [2022-03-20 21:06:50,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:06:50,049 INFO L225 Difference]: With dead ends: 530 [2022-03-20 21:06:50,049 INFO L226 Difference]: Without dead ends: 527 [2022-03-20 21:06:50,050 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 190 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=149, Invalid=672, Unknown=3, NotChecked=168, Total=992 [2022-03-20 21:06:50,050 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 48 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 21:06:50,050 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 402 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 420 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 21:06:50,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2022-03-20 21:06:50,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 448. [2022-03-20 21:06:50,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 260 states have (on average 1.1923076923076923) internal successors, (310), 261 states have internal predecessors, (310), 155 states have call successors, (155), 33 states have call predecessors, (155), 32 states have return successors, (153), 153 states have call predecessors, (153), 153 states have call successors, (153) [2022-03-20 21:06:50,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 618 transitions. [2022-03-20 21:06:50,137 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 618 transitions. Word has length 108 [2022-03-20 21:06:50,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:06:50,137 INFO L478 AbstractCegarLoop]: Abstraction has 448 states and 618 transitions. [2022-03-20 21:06:50,137 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2022-03-20 21:06:50,137 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 618 transitions. [2022-03-20 21:06:50,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-03-20 21:06:50,138 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:06:50,139 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 9, 6, 4, 4, 4, 4, 4, 3, 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, 1] [2022-03-20 21:06:50,160 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-20 21:06:50,351 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 [2022-03-20 21:06:50,351 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:06:50,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:06:50,351 INFO L85 PathProgramCache]: Analyzing trace with hash 826422219, now seen corresponding path program 9 times [2022-03-20 21:06:50,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:50,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1623313569] [2022-03-20 21:06:50,352 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:06:50,352 INFO L85 PathProgramCache]: Analyzing trace with hash 826422219, now seen corresponding path program 10 times [2022-03-20 21:06:50,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:06:50,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645688038] [2022-03-20 21:06:50,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:06:50,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:06:50,359 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:06:50,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1589091716] [2022-03-20 21:06:50,360 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 21:06:50,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:06:50,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:06:50,361 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) [2022-03-20 21:06:50,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-20 21:06:50,416 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 21:06:50,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:06:50,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 104 conjunts are in the unsatisfiable core [2022-03-20 21:06:50,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:06:51,516 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 22 proven. 114 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-03-20 21:06:51,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:06:52,086 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 78 proven. 27 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2022-03-20 21:06:52,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:06:52,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645688038] [2022-03-20 21:06:52,087 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:06:52,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589091716] [2022-03-20 21:06:52,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589091716] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:06:52,087 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:06:52,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 12] total 28 [2022-03-20 21:06:52,087 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:06:52,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1623313569] [2022-03-20 21:06:52,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1623313569] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:06:52,087 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:06:52,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-20 21:06:52,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878129561] [2022-03-20 21:06:52,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:06:52,088 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-20 21:06:52,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:52,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-20 21:06:52,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2022-03-20 21:06:52,089 INFO L87 Difference]: Start difference. First operand 448 states and 618 transitions. Second operand has 21 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 8 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 8 states have call successors, (14) [2022-03-20 21:06:53,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:06:53,094 INFO L93 Difference]: Finished difference Result 523 states and 710 transitions. [2022-03-20 21:06:53,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 21:06:53,094 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 8 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 8 states have call successors, (14) Word has length 107 [2022-03-20 21:06:53,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:06:53,098 INFO L225 Difference]: With dead ends: 523 [2022-03-20 21:06:53,098 INFO L226 Difference]: Without dead ends: 521 [2022-03-20 21:06:53,098 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 185 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=163, Invalid=959, Unknown=0, NotChecked=0, Total=1122 [2022-03-20 21:06:53,099 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 70 mSDsluCounter, 776 mSDsCounter, 0 mSdLazyCounter, 1187 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 834 SdHoareTripleChecker+Invalid, 1233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 21:06:53,099 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 834 Invalid, 1233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1187 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 21:06:53,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2022-03-20 21:06:53,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 499. [2022-03-20 21:06:53,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 291 states have (on average 1.1890034364261168) internal successors, (346), 292 states have internal predecessors, (346), 171 states have call successors, (171), 37 states have call predecessors, (171), 36 states have return successors, (169), 169 states have call predecessors, (169), 169 states have call successors, (169) [2022-03-20 21:06:53,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 686 transitions. [2022-03-20 21:06:53,241 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 686 transitions. Word has length 107 [2022-03-20 21:06:53,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:06:53,241 INFO L478 AbstractCegarLoop]: Abstraction has 499 states and 686 transitions. [2022-03-20 21:06:53,241 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 8 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 8 states have call successors, (14) [2022-03-20 21:06:53,241 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 686 transitions. [2022-03-20 21:06:53,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-03-20 21:06:53,242 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:06:53,243 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:06:53,266 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-20 21:06:53,463 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 [2022-03-20 21:06:53,463 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:06:53,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:06:53,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1002671399, now seen corresponding path program 7 times [2022-03-20 21:06:53,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:53,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1074642211] [2022-03-20 21:06:53,464 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:06:53,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1002671399, now seen corresponding path program 8 times [2022-03-20 21:06:53,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:06:53,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033427643] [2022-03-20 21:06:53,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:06:53,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:06:53,471 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:06:53,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [851048093] [2022-03-20 21:06:53,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 21:06:53,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:06:53,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:06:53,472 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) [2022-03-20 21:06:53,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-20 21:06:53,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 21:06:53,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:06:53,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 68 conjunts are in the unsatisfiable core [2022-03-20 21:06:53,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:06:54,459 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:06:54,671 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 90 proven. 42 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2022-03-20 21:06:54,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:06:55,212 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:06:55,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:06:55,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033427643] [2022-03-20 21:06:55,740 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:06:55,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851048093] [2022-03-20 21:06:55,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851048093] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 21:06:55,740 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 21:06:55,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-03-20 21:06:55,740 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:06:55,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1074642211] [2022-03-20 21:06:55,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1074642211] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:06:55,740 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:06:55,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-20 21:06:55,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213435872] [2022-03-20 21:06:55,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:06:55,741 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 21:06:55,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:55,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 21:06:55,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-03-20 21:06:55,741 INFO L87 Difference]: Start difference. First operand 499 states and 686 transitions. Second operand has 18 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) [2022-03-20 21:06:57,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:06:57,820 INFO L93 Difference]: Finished difference Result 588 states and 809 transitions. [2022-03-20 21:06:57,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 21:06:57,821 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) Word has length 111 [2022-03-20 21:06:57,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:06:57,824 INFO L225 Difference]: With dead ends: 588 [2022-03-20 21:06:57,824 INFO L226 Difference]: Without dead ends: 585 [2022-03-20 21:06:57,824 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2022-03-20 21:06:57,825 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 45 mSDsluCounter, 672 mSDsCounter, 0 mSdLazyCounter, 939 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 725 SdHoareTripleChecker+Invalid, 972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 939 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-20 21:06:57,825 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 725 Invalid, 972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 939 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-20 21:06:57,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2022-03-20 21:06:57,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 528. [2022-03-20 21:06:57,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 528 states, 306 states have (on average 1.1928104575163399) internal successors, (365), 307 states have internal predecessors, (365), 183 states have call successors, (183), 39 states have call predecessors, (183), 38 states have return successors, (181), 181 states have call predecessors, (181), 181 states have call successors, (181) [2022-03-20 21:06:57,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 729 transitions. [2022-03-20 21:06:57,946 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 729 transitions. Word has length 111 [2022-03-20 21:06:57,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:06:57,946 INFO L478 AbstractCegarLoop]: Abstraction has 528 states and 729 transitions. [2022-03-20 21:06:57,946 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) [2022-03-20 21:06:57,946 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 729 transitions. [2022-03-20 21:06:57,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-03-20 21:06:57,948 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:06:57,948 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:06:57,964 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-20 21:06:58,149 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 [2022-03-20 21:06:58,149 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:06:58,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:06:58,150 INFO L85 PathProgramCache]: Analyzing trace with hash 890766036, now seen corresponding path program 9 times [2022-03-20 21:06:58,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:58,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1847567698] [2022-03-20 21:06:58,150 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:06:58,150 INFO L85 PathProgramCache]: Analyzing trace with hash 890766036, now seen corresponding path program 10 times [2022-03-20 21:06:58,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:06:58,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23521625] [2022-03-20 21:06:58,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:06:58,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:06:58,158 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:06:58,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [786371953] [2022-03-20 21:06:58,158 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 21:06:58,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:06:58,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:06:58,162 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) [2022-03-20 21:06:58,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-20 21:06:58,207 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 21:06:58,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:06:58,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 99 conjunts are in the unsatisfiable core [2022-03-20 21:06:58,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:06:59,482 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 106 proven. 63 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2022-03-20 21:06:59,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:07:05,047 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 105 proven. 29 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2022-03-20 21:07:05,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:07:05,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23521625] [2022-03-20 21:07:05,047 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:07:05,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786371953] [2022-03-20 21:07:05,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786371953] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:07:05,050 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:07:05,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17] total 34 [2022-03-20 21:07:05,050 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:07:05,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1847567698] [2022-03-20 21:07:05,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1847567698] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:07:05,050 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:07:05,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-20 21:07:05,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306801620] [2022-03-20 21:07:05,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:07:05,050 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-20 21:07:05,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:07:05,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-20 21:07:05,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=940, Unknown=0, NotChecked=0, Total=1122 [2022-03-20 21:07:05,051 INFO L87 Difference]: Start difference. First operand 528 states and 729 transitions. Second operand has 22 states, 20 states have (on average 2.05) internal successors, (41), 19 states have internal predecessors, (41), 8 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 6 states have call predecessors, (17), 7 states have call successors, (17) [2022-03-20 21:07:06,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:07:06,339 INFO L93 Difference]: Finished difference Result 644 states and 877 transitions. [2022-03-20 21:07:06,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-20 21:07:06,339 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.05) internal successors, (41), 19 states have internal predecessors, (41), 8 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 6 states have call predecessors, (17), 7 states have call successors, (17) Word has length 113 [2022-03-20 21:07:06,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:07:06,342 INFO L225 Difference]: With dead ends: 644 [2022-03-20 21:07:06,342 INFO L226 Difference]: Without dead ends: 576 [2022-03-20 21:07:06,343 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 189 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=258, Invalid=1382, Unknown=0, NotChecked=0, Total=1640 [2022-03-20 21:07:06,344 INFO L913 BasicCegarLoop]: 51 mSDtfsCounter, 76 mSDsluCounter, 596 mSDsCounter, 0 mSdLazyCounter, 1115 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 647 SdHoareTripleChecker+Invalid, 1184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 21:07:06,344 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 647 Invalid, 1184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1115 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 21:07:06,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2022-03-20 21:07:06,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 561. [2022-03-20 21:07:06,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 561 states, 324 states have (on average 1.191358024691358) internal successors, (386), 325 states have internal predecessors, (386), 195 states have call successors, (195), 42 states have call predecessors, (195), 41 states have return successors, (193), 193 states have call predecessors, (193), 193 states have call successors, (193) [2022-03-20 21:07:06,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 774 transitions. [2022-03-20 21:07:06,498 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 774 transitions. Word has length 113 [2022-03-20 21:07:06,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:07:06,498 INFO L478 AbstractCegarLoop]: Abstraction has 561 states and 774 transitions. [2022-03-20 21:07:06,498 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 2.05) internal successors, (41), 19 states have internal predecessors, (41), 8 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 6 states have call predecessors, (17), 7 states have call successors, (17) [2022-03-20 21:07:06,499 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 774 transitions. [2022-03-20 21:07:06,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-03-20 21:07:06,500 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:07:06,500 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:07:06,527 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-20 21:07:06,727 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 [2022-03-20 21:07:06,728 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:07:06,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:07:06,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1938711081, now seen corresponding path program 11 times [2022-03-20 21:07:06,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:07:06,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [380213816] [2022-03-20 21:07:06,728 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:07:06,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1938711081, now seen corresponding path program 12 times [2022-03-20 21:07:06,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:07:06,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676127395] [2022-03-20 21:07:06,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:07:06,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:07:06,737 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:07:06,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2078987012] [2022-03-20 21:07:06,737 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 21:07:06,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:07:06,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:07:06,739 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) [2022-03-20 21:07:06,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-20 21:07:06,803 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-20 21:07:06,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:07:06,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 104 conjunts are in the unsatisfiable core [2022-03-20 21:07:06,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:07:08,239 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 68 proven. 99 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2022-03-20 21:07:08,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:07:19,055 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 66 proven. 77 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2022-03-20 21:07:19,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:07:19,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676127395] [2022-03-20 21:07:19,055 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:07:19,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078987012] [2022-03-20 21:07:19,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078987012] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:07:19,056 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:07:19,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 38 [2022-03-20 21:07:19,056 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:07:19,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [380213816] [2022-03-20 21:07:19,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [380213816] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:07:19,056 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:07:19,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-20 21:07:19,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023049251] [2022-03-20 21:07:19,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:07:19,056 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-20 21:07:19,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:07:19,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-20 21:07:19,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=1154, Unknown=0, NotChecked=0, Total=1406 [2022-03-20 21:07:19,057 INFO L87 Difference]: Start difference. First operand 561 states and 774 transitions. Second operand has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2022-03-20 21:07:20,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:07:20,181 INFO L93 Difference]: Finished difference Result 658 states and 887 transitions. [2022-03-20 21:07:20,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-20 21:07:20,183 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) Word has length 116 [2022-03-20 21:07:20,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:07:20,185 INFO L225 Difference]: With dead ends: 658 [2022-03-20 21:07:20,185 INFO L226 Difference]: Without dead ends: 583 [2022-03-20 21:07:20,186 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 192 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=322, Invalid=1570, Unknown=0, NotChecked=0, Total=1892 [2022-03-20 21:07:20,186 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 105 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 921 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 1066 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 921 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 21:07:20,187 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 329 Invalid, 1066 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 921 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 21:07:20,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2022-03-20 21:07:20,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 529. [2022-03-20 21:07:20,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 308 states have (on average 1.1818181818181819) internal successors, (364), 309 states have internal predecessors, (364), 179 states have call successors, (179), 42 states have call predecessors, (179), 41 states have return successors, (177), 177 states have call predecessors, (177), 177 states have call successors, (177) [2022-03-20 21:07:20,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 720 transitions. [2022-03-20 21:07:20,334 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 720 transitions. Word has length 116 [2022-03-20 21:07:20,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:07:20,334 INFO L478 AbstractCegarLoop]: Abstraction has 529 states and 720 transitions. [2022-03-20 21:07:20,335 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2022-03-20 21:07:20,335 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 720 transitions. [2022-03-20 21:07:20,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-03-20 21:07:20,336 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:07:20,336 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:07:20,359 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-20 21:07:20,559 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 [2022-03-20 21:07:20,559 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:07:20,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:07:20,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1687072417, now seen corresponding path program 13 times [2022-03-20 21:07:20,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:07:20,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1421034257] [2022-03-20 21:07:20,560 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:07:20,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1687072417, now seen corresponding path program 14 times [2022-03-20 21:07:20,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:07:20,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287832938] [2022-03-20 21:07:20,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:07:20,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:07:20,569 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:07:20,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1354522149] [2022-03-20 21:07:20,570 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 21:07:20,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:07:20,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:07:20,571 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) [2022-03-20 21:07:20,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-20 21:07:20,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 21:07:20,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:07:20,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 91 conjunts are in the unsatisfiable core [2022-03-20 21:07:20,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:07:21,706 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:07:21,710 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:07:32,930 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 95 proven. 63 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2022-03-20 21:07:32,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:07:34,952 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:07:38,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:07:38,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287832938] [2022-03-20 21:07:38,896 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:07:38,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354522149] [2022-03-20 21:07:38,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354522149] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 21:07:38,896 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 21:07:38,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2022-03-20 21:07:38,897 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:07:38,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1421034257] [2022-03-20 21:07:38,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1421034257] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:07:38,897 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:07:38,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-20 21:07:38,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391156879] [2022-03-20 21:07:38,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:07:38,897 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-20 21:07:38,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:07:38,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-20 21:07:38,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=703, Unknown=1, NotChecked=0, Total=812 [2022-03-20 21:07:38,898 INFO L87 Difference]: Start difference. First operand 529 states and 720 transitions. Second operand has 20 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2022-03-20 21:07:50,367 WARN L232 SmtUtils]: Spent 5.46s on a formula simplification. DAG size of input: 96 DAG size of output: 86 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 21:07:54,043 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 [] [2022-03-20 21:07:56,046 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 [] [2022-03-20 21:07:58,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:07:58,374 INFO L93 Difference]: Finished difference Result 621 states and 847 transitions. [2022-03-20 21:07:58,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-20 21:07:58,374 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) Word has length 116 [2022-03-20 21:07:58,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:07:58,377 INFO L225 Difference]: With dead ends: 621 [2022-03-20 21:07:58,377 INFO L226 Difference]: Without dead ends: 618 [2022-03-20 21:07:58,380 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 120 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 18.0s TimeCoverageRelationStatistics Valid=187, Invalid=1217, Unknown=2, NotChecked=0, Total=1406 [2022-03-20 21:07:58,380 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 77 mSDsluCounter, 728 mSDsCounter, 0 mSdLazyCounter, 1122 mSolverCounterSat, 87 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 788 SdHoareTripleChecker+Invalid, 1211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1122 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.5s IncrementalHoareTripleChecker+Time [2022-03-20 21:07:58,381 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 788 Invalid, 1211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1122 Invalid, 2 Unknown, 0 Unchecked, 8.5s Time] [2022-03-20 21:07:58,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2022-03-20 21:07:58,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 594. [2022-03-20 21:07:58,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 594 states, 342 states have (on average 1.1900584795321638) internal successors, (407), 343 states have internal predecessors, (407), 207 states have call successors, (207), 45 states have call predecessors, (207), 44 states have return successors, (205), 205 states have call predecessors, (205), 205 states have call successors, (205) [2022-03-20 21:07:58,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 819 transitions. [2022-03-20 21:07:58,553 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 819 transitions. Word has length 116 [2022-03-20 21:07:58,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:07:58,555 INFO L478 AbstractCegarLoop]: Abstraction has 594 states and 819 transitions. [2022-03-20 21:07:58,555 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2022-03-20 21:07:58,555 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 819 transitions. [2022-03-20 21:07:58,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-03-20 21:07:58,565 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:07:58,565 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:07:58,587 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-20 21:07:58,779 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 [2022-03-20 21:07:58,779 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:07:58,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:07:58,780 INFO L85 PathProgramCache]: Analyzing trace with hash 764235165, now seen corresponding path program 15 times [2022-03-20 21:07:58,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:07:58,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [960449257] [2022-03-20 21:07:58,781 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:07:58,781 INFO L85 PathProgramCache]: Analyzing trace with hash 764235165, now seen corresponding path program 16 times [2022-03-20 21:07:58,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:07:58,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847555057] [2022-03-20 21:07:58,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:07:58,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:07:58,787 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:07:58,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [487974246] [2022-03-20 21:07:58,787 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 21:07:58,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:07:58,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:07:58,789 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) [2022-03-20 21:07:58,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-20 21:07:58,922 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 21:07:58,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:07:58,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 126 conjunts are in the unsatisfiable core [2022-03-20 21:07:58,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:07:59,442 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:07:59,534 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:07:59,605 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:07:59,988 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:07:59,991 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:08:52,476 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 87 proven. 108 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2022-03-20 21:08:52,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:08:56,406 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 129 proven. 17 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-03-20 21:08:56,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:08:56,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847555057] [2022-03-20 21:08:56,406 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:08:56,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487974246] [2022-03-20 21:08:56,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487974246] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:08:56,407 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:08:56,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 15] total 37 [2022-03-20 21:08:56,407 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:08:56,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [960449257] [2022-03-20 21:08:56,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [960449257] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:08:56,407 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:08:56,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-03-20 21:08:56,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248657083] [2022-03-20 21:08:56,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:08:56,407 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-20 21:08:56,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:08:56,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-20 21:08:56,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1121, Unknown=0, NotChecked=0, Total=1332 [2022-03-20 21:08:56,408 INFO L87 Difference]: Start difference. First operand 594 states and 819 transitions. Second operand has 27 states, 25 states have (on average 1.96) internal successors, (49), 23 states have internal predecessors, (49), 9 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 6 states have call predecessors, (17), 8 states have call successors, (17) [2022-03-20 21:09:02,098 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 [] [2022-03-20 21:09:03,343 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 21:09:07,072 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 21:09:10,116 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 21:09:23,821 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 21:09:24,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:09:24,350 INFO L93 Difference]: Finished difference Result 714 states and 983 transitions. [2022-03-20 21:09:24,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-20 21:09:24,351 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 1.96) internal successors, (49), 23 states have internal predecessors, (49), 9 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 6 states have call predecessors, (17), 8 states have call successors, (17) Word has length 121 [2022-03-20 21:09:24,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:09:24,354 INFO L225 Difference]: With dead ends: 714 [2022-03-20 21:09:24,354 INFO L226 Difference]: Without dead ends: 711 [2022-03-20 21:09:24,355 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 202 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 22.6s TimeCoverageRelationStatistics Valid=317, Invalid=1845, Unknown=0, NotChecked=0, Total=2162 [2022-03-20 21:09:24,356 INFO L913 BasicCegarLoop]: 59 mSDtfsCounter, 108 mSDsluCounter, 788 mSDsCounter, 0 mSdLazyCounter, 1893 mSolverCounterSat, 85 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 847 SdHoareTripleChecker+Invalid, 1981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1893 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.8s IncrementalHoareTripleChecker+Time [2022-03-20 21:09:24,357 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 847 Invalid, 1981 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1893 Invalid, 3 Unknown, 0 Unchecked, 22.8s Time] [2022-03-20 21:09:24,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 711 states. [2022-03-20 21:09:24,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 711 to 682. [2022-03-20 21:09:24,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 682 states, 389 states have (on average 1.1979434447300772) internal successors, (466), 390 states have internal predecessors, (466), 243 states have call successors, (243), 50 states have call predecessors, (243), 49 states have return successors, (241), 241 states have call predecessors, (241), 241 states have call successors, (241) [2022-03-20 21:09:24,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 950 transitions. [2022-03-20 21:09:24,585 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 950 transitions. Word has length 121 [2022-03-20 21:09:24,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:09:24,585 INFO L478 AbstractCegarLoop]: Abstraction has 682 states and 950 transitions. [2022-03-20 21:09:24,585 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 1.96) internal successors, (49), 23 states have internal predecessors, (49), 9 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 6 states have call predecessors, (17), 8 states have call successors, (17) [2022-03-20 21:09:24,585 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 950 transitions. [2022-03-20 21:09:24,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-03-20 21:09:24,587 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:09:24,587 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:09:24,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-20 21:09:24,811 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:09:24,811 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:09:24,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:09:24,811 INFO L85 PathProgramCache]: Analyzing trace with hash 65157230, now seen corresponding path program 1 times [2022-03-20 21:09:24,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:09:24,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1025262160] [2022-03-20 21:09:24,812 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:09:24,812 INFO L85 PathProgramCache]: Analyzing trace with hash 65157230, now seen corresponding path program 2 times [2022-03-20 21:09:24,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:09:24,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608100553] [2022-03-20 21:09:24,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:09:24,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:09:24,819 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:09:24,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [142220302] [2022-03-20 21:09:24,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 21:09:24,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:09:24,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:09:24,821 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 21:09:24,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-20 21:09:24,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 21:09:24,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:09:24,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-20 21:09:24,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:09:25,246 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 89 proven. 45 refuted. 0 times theorem prover too weak. 283 trivial. 0 not checked. [2022-03-20 21:09:25,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:09:25,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:09:25,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608100553] [2022-03-20 21:09:25,972 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:09:25,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142220302] [2022-03-20 21:09:25,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142220302] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 21:09:25,972 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 21:09:25,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2022-03-20 21:09:25,972 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:09:25,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1025262160] [2022-03-20 21:09:25,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1025262160] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:09:25,973 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:09:25,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 21:09:25,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601967759] [2022-03-20 21:09:25,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:09:25,973 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 21:09:25,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:09:25,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 21:09:25,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-03-20 21:09:25,974 INFO L87 Difference]: Start difference. First operand 682 states and 950 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 6 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2022-03-20 21:09:26,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:09:26,850 INFO L93 Difference]: Finished difference Result 762 states and 1047 transitions. [2022-03-20 21:09:26,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-20 21:09:26,851 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 6 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) Word has length 124 [2022-03-20 21:09:26,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:09:26,854 INFO L225 Difference]: With dead ends: 762 [2022-03-20 21:09:26,854 INFO L226 Difference]: Without dead ends: 662 [2022-03-20 21:09:26,855 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 174 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=265, Invalid=1217, Unknown=0, NotChecked=0, Total=1482 [2022-03-20 21:09:26,856 INFO L913 BasicCegarLoop]: 85 mSDtfsCounter, 87 mSDsluCounter, 722 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 807 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 21:09:26,856 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 807 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 598 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 21:09:26,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2022-03-20 21:09:27,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 646. [2022-03-20 21:09:27,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 646 states, 370 states have (on average 1.191891891891892) internal successors, (441), 371 states have internal predecessors, (441), 227 states have call successors, (227), 49 states have call predecessors, (227), 48 states have return successors, (225), 225 states have call predecessors, (225), 225 states have call successors, (225) [2022-03-20 21:09:27,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 893 transitions. [2022-03-20 21:09:27,033 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 893 transitions. Word has length 124 [2022-03-20 21:09:27,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:09:27,033 INFO L478 AbstractCegarLoop]: Abstraction has 646 states and 893 transitions. [2022-03-20 21:09:27,033 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 6 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2022-03-20 21:09:27,033 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 893 transitions. [2022-03-20 21:09:27,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-03-20 21:09:27,035 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:09:27,035 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:09:27,051 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-03-20 21:09:27,235 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-03-20 21:09:27,235 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:09:27,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:09:27,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1339589678, now seen corresponding path program 3 times [2022-03-20 21:09:27,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:09:27,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1750302418] [2022-03-20 21:09:27,236 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:09:27,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1339589678, now seen corresponding path program 4 times [2022-03-20 21:09:27,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:09:27,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488586650] [2022-03-20 21:09:27,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:09:27,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:09:27,243 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:09:27,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [740240814] [2022-03-20 21:09:27,244 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 21:09:27,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:09:27,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:09:27,245 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 21:09:27,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-20 21:09:27,295 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 21:09:27,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:09:27,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-20 21:09:27,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:09:27,653 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 99 proven. 35 refuted. 0 times theorem prover too weak. 283 trivial. 0 not checked. [2022-03-20 21:09:27,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:09:28,184 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 55 proven. 33 refuted. 0 times theorem prover too weak. 329 trivial. 0 not checked. [2022-03-20 21:09:28,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:09:28,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488586650] [2022-03-20 21:09:28,185 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:09:28,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740240814] [2022-03-20 21:09:28,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740240814] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:09:28,185 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:09:28,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 26 [2022-03-20 21:09:28,185 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:09:28,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1750302418] [2022-03-20 21:09:28,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1750302418] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:09:28,185 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:09:28,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 21:09:28,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365475197] [2022-03-20 21:09:28,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:09:28,186 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 21:09:28,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:09:28,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 21:09:28,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2022-03-20 21:09:28,187 INFO L87 Difference]: Start difference. First operand 646 states and 893 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 6 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2022-03-20 21:09:29,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:09:29,324 INFO L93 Difference]: Finished difference Result 815 states and 1138 transitions. [2022-03-20 21:09:29,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-20 21:09:29,324 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 6 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) Word has length 124 [2022-03-20 21:09:29,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:09:29,328 INFO L225 Difference]: With dead ends: 815 [2022-03-20 21:09:29,328 INFO L226 Difference]: Without dead ends: 751 [2022-03-20 21:09:29,329 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=418, Invalid=1744, Unknown=0, NotChecked=0, Total=2162 [2022-03-20 21:09:29,330 INFO L913 BasicCegarLoop]: 122 mSDtfsCounter, 85 mSDsluCounter, 773 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 895 SdHoareTripleChecker+Invalid, 819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 21:09:29,330 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 895 Invalid, 819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 617 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 21:09:29,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2022-03-20 21:09:29,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 713. [2022-03-20 21:09:29,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 713 states, 405 states have (on average 1.1975308641975309) internal successors, (485), 406 states have internal predecessors, (485), 259 states have call successors, (259), 49 states have call predecessors, (259), 48 states have return successors, (257), 257 states have call predecessors, (257), 257 states have call successors, (257) [2022-03-20 21:09:29,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 1001 transitions. [2022-03-20 21:09:29,531 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 1001 transitions. Word has length 124 [2022-03-20 21:09:29,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:09:29,531 INFO L478 AbstractCegarLoop]: Abstraction has 713 states and 1001 transitions. [2022-03-20 21:09:29,531 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 6 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2022-03-20 21:09:29,531 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 1001 transitions. [2022-03-20 21:09:29,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-03-20 21:09:29,533 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:09:29,533 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-03-20 21:09:29,557 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-03-20 21:09:29,747 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-03-20 21:09:29,747 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:09:29,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:09:29,748 INFO L85 PathProgramCache]: Analyzing trace with hash -590650772, now seen corresponding path program 5 times [2022-03-20 21:09:29,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:09:29,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1420173370] [2022-03-20 21:09:29,748 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:09:29,748 INFO L85 PathProgramCache]: Analyzing trace with hash -590650772, now seen corresponding path program 6 times [2022-03-20 21:09:29,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:09:29,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950731254] [2022-03-20 21:09:29,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:09:29,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:09:29,760 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:09:29,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1715093310] [2022-03-20 21:09:29,761 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 21:09:29,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:09:29,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:09:29,762 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 21:09:29,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-20 21:09:29,825 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 21:09:29,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:09:29,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-20 21:09:29,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:09:30,206 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 95 proven. 62 refuted. 0 times theorem prover too weak. 278 trivial. 0 not checked. [2022-03-20 21:09:30,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:09:32,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:09:32,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950731254] [2022-03-20 21:09:32,681 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:09:32,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715093310] [2022-03-20 21:09:32,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715093310] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 21:09:32,681 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 21:09:32,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-03-20 21:09:32,681 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:09:32,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1420173370] [2022-03-20 21:09:32,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1420173370] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:09:32,681 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:09:32,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 21:09:32,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192161957] [2022-03-20 21:09:32,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:09:32,682 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 21:09:32,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:09:32,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 21:09:32,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-03-20 21:09:32,682 INFO L87 Difference]: Start difference. First operand 713 states and 1001 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 4 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) [2022-03-20 21:09:34,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:09:34,128 INFO L93 Difference]: Finished difference Result 753 states and 1042 transitions. [2022-03-20 21:09:34,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 21:09:34,128 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 4 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) Word has length 129 [2022-03-20 21:09:34,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:09:34,131 INFO L225 Difference]: With dead ends: 753 [2022-03-20 21:09:34,131 INFO L226 Difference]: Without dead ends: 751 [2022-03-20 21:09:34,132 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 136 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2022-03-20 21:09:34,132 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 57 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-20 21:09:34,132 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 267 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-20 21:09:34,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2022-03-20 21:09:34,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 726. [2022-03-20 21:09:34,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 726 states, 414 states have (on average 1.1932367149758454) internal successors, (494), 416 states have internal predecessors, (494), 261 states have call successors, (261), 51 states have call predecessors, (261), 50 states have return successors, (259), 258 states have call predecessors, (259), 259 states have call successors, (259) [2022-03-20 21:09:34,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 726 states to 726 states and 1014 transitions. [2022-03-20 21:09:34,336 INFO L78 Accepts]: Start accepts. Automaton has 726 states and 1014 transitions. Word has length 129 [2022-03-20 21:09:34,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:09:34,337 INFO L478 AbstractCegarLoop]: Abstraction has 726 states and 1014 transitions. [2022-03-20 21:09:34,337 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 4 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) [2022-03-20 21:09:34,337 INFO L276 IsEmpty]: Start isEmpty. Operand 726 states and 1014 transitions. [2022-03-20 21:09:34,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-03-20 21:09:34,339 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:09:34,339 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:09:34,361 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-20 21:09:34,555 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-03-20 21:09:34,555 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:09:34,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:09:34,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1469141304, now seen corresponding path program 17 times [2022-03-20 21:09:34,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:09:34,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1969221650] [2022-03-20 21:09:34,556 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:09:34,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1469141304, now seen corresponding path program 18 times [2022-03-20 21:09:34,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:09:34,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415790226] [2022-03-20 21:09:34,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:09:34,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:09:34,563 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:09:34,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [653141180] [2022-03-20 21:09:34,563 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 21:09:34,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:09:34,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:09:34,564 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 21:09:34,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-20 21:09:34,630 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-20 21:09:34,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:09:34,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 21:09:34,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:09:34,828 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 243 proven. 18 refuted. 0 times theorem prover too weak. 320 trivial. 0 not checked. [2022-03-20 21:09:34,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:09:35,027 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 59 proven. 18 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2022-03-20 21:09:35,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:09:35,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415790226] [2022-03-20 21:09:35,028 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:09:35,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653141180] [2022-03-20 21:09:35,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653141180] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:09:35,028 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:09:35,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2022-03-20 21:09:35,028 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:09:35,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1969221650] [2022-03-20 21:09:35,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1969221650] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:09:35,028 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:09:35,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 21:09:35,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489629797] [2022-03-20 21:09:35,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:09:35,029 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 21:09:35,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:09:35,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 21:09:35,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-03-20 21:09:35,029 INFO L87 Difference]: Start difference. First operand 726 states and 1014 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 5 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2022-03-20 21:09:35,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:09:35,422 INFO L93 Difference]: Finished difference Result 1285 states and 1857 transitions. [2022-03-20 21:09:35,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 21:09:35,422 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 5 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) Word has length 133 [2022-03-20 21:09:35,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:09:35,426 INFO L225 Difference]: With dead ends: 1285 [2022-03-20 21:09:35,426 INFO L226 Difference]: Without dead ends: 905 [2022-03-20 21:09:35,427 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 259 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-03-20 21:09:35,428 INFO L913 BasicCegarLoop]: 66 mSDtfsCounter, 9 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 21:09:35,428 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 248 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 21:09:35,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 905 states. [2022-03-20 21:09:35,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 905 to 854. [2022-03-20 21:09:35,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 854 states, 469 states have (on average 1.2132196162046909) internal successors, (569), 482 states have internal predecessors, (569), 337 states have call successors, (337), 48 states have call predecessors, (337), 47 states have return successors, (335), 323 states have call predecessors, (335), 335 states have call successors, (335) [2022-03-20 21:09:35,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 854 states to 854 states and 1241 transitions. [2022-03-20 21:09:35,688 INFO L78 Accepts]: Start accepts. Automaton has 854 states and 1241 transitions. Word has length 133 [2022-03-20 21:09:35,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:09:35,688 INFO L478 AbstractCegarLoop]: Abstraction has 854 states and 1241 transitions. [2022-03-20 21:09:35,688 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 5 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2022-03-20 21:09:35,689 INFO L276 IsEmpty]: Start isEmpty. Operand 854 states and 1241 transitions. [2022-03-20 21:09:35,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-03-20 21:09:35,690 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:09:35,691 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:09:35,717 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-20 21:09:35,903 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-03-20 21:09:35,903 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:09:35,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:09:35,904 INFO L85 PathProgramCache]: Analyzing trace with hash -914829018, now seen corresponding path program 19 times [2022-03-20 21:09:35,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:09:35,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [432032328] [2022-03-20 21:09:35,904 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:09:35,904 INFO L85 PathProgramCache]: Analyzing trace with hash -914829018, now seen corresponding path program 20 times [2022-03-20 21:09:35,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:09:35,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367366695] [2022-03-20 21:09:35,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:09:35,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:09:35,916 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:09:35,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1372549018] [2022-03-20 21:09:35,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 21:09:35,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:09:35,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:09:35,918 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 21:09:35,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-20 21:09:35,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 21:09:35,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:09:35,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 81 conjunts are in the unsatisfiable core [2022-03-20 21:09:35,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:09:37,075 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 133 proven. 88 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2022-03-20 21:09:37,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:09:47,489 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 134 proven. 60 refuted. 0 times theorem prover too weak. 387 trivial. 0 not checked. [2022-03-20 21:09:47,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:09:47,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367366695] [2022-03-20 21:09:47,490 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:09:47,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372549018] [2022-03-20 21:09:47,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372549018] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:09:47,490 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:09:47,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 31 [2022-03-20 21:09:47,490 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:09:47,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [432032328] [2022-03-20 21:09:47,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [432032328] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:09:47,490 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:09:47,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-20 21:09:47,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80242862] [2022-03-20 21:09:47,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:09:47,491 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 21:09:47,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:09:47,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 21:09:47,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=744, Unknown=0, NotChecked=0, Total=930 [2022-03-20 21:09:47,492 INFO L87 Difference]: Start difference. First operand 854 states and 1241 transitions. Second operand has 17 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 7 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 6 states have call predecessors, (21), 6 states have call successors, (21) [2022-03-20 21:09:48,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:09:48,622 INFO L93 Difference]: Finished difference Result 982 states and 1424 transitions. [2022-03-20 21:09:48,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 21:09:48,623 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 7 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 6 states have call predecessors, (21), 6 states have call successors, (21) Word has length 133 [2022-03-20 21:09:48,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:09:48,627 INFO L225 Difference]: With dead ends: 982 [2022-03-20 21:09:48,627 INFO L226 Difference]: Without dead ends: 979 [2022-03-20 21:09:48,627 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 232 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=225, Invalid=965, Unknown=0, NotChecked=0, Total=1190 [2022-03-20 21:09:48,628 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 50 mSDsluCounter, 583 mSDsCounter, 0 mSdLazyCounter, 915 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 641 SdHoareTripleChecker+Invalid, 966 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 915 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 21:09:48,628 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 641 Invalid, 966 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 915 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 21:09:48,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 979 states. [2022-03-20 21:09:48,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 979 to 893. [2022-03-20 21:09:48,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 489 states have (on average 1.2147239263803682) internal successors, (594), 502 states have internal predecessors, (594), 353 states have call successors, (353), 51 states have call predecessors, (353), 50 states have return successors, (351), 339 states have call predecessors, (351), 351 states have call successors, (351) [2022-03-20 21:09:48,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 1298 transitions. [2022-03-20 21:09:48,904 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 1298 transitions. Word has length 133 [2022-03-20 21:09:48,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:09:48,904 INFO L478 AbstractCegarLoop]: Abstraction has 893 states and 1298 transitions. [2022-03-20 21:09:48,904 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 7 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 6 states have call predecessors, (21), 6 states have call successors, (21) [2022-03-20 21:09:48,905 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 1298 transitions. [2022-03-20 21:09:48,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-03-20 21:09:48,906 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:09:48,906 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:09:48,927 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-20 21:09:49,119 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-20 21:09:49,119 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:09:49,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:09:49,120 INFO L85 PathProgramCache]: Analyzing trace with hash -112069451, now seen corresponding path program 21 times [2022-03-20 21:09:49,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:09:49,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [157264104] [2022-03-20 21:09:49,120 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:09:49,121 INFO L85 PathProgramCache]: Analyzing trace with hash -112069451, now seen corresponding path program 22 times [2022-03-20 21:09:49,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:09:49,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141116639] [2022-03-20 21:09:49,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:09:49,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:09:49,128 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:09:49,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1743203497] [2022-03-20 21:09:49,128 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 21:09:49,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:09:49,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:09:49,132 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 21:09:49,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-20 21:09:49,189 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 21:09:49,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:09:49,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-20 21:09:49,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:09:49,585 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 42 proven. 48 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2022-03-20 21:09:49,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:10:11,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:10:11,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141116639] [2022-03-20 21:10:11,487 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:10:11,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743203497] [2022-03-20 21:10:11,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743203497] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 21:10:11,487 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 21:10:11,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-03-20 21:10:11,487 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:10:11,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [157264104] [2022-03-20 21:10:11,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [157264104] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:10:11,487 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:10:11,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 21:10:11,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547708512] [2022-03-20 21:10:11,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:10:11,488 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 21:10:11,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:10:11,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 21:10:11,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=387, Unknown=4, NotChecked=0, Total=462 [2022-03-20 21:10:11,488 INFO L87 Difference]: Start difference. First operand 893 states and 1298 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 7 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 6 states have call predecessors, (21), 6 states have call successors, (21) [2022-03-20 21:10:12,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:10:12,455 INFO L93 Difference]: Finished difference Result 1361 states and 2041 transitions. [2022-03-20 21:10:12,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 21:10:12,455 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 7 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 6 states have call predecessors, (21), 6 states have call successors, (21) Word has length 135 [2022-03-20 21:10:12,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:10:12,460 INFO L225 Difference]: With dead ends: 1361 [2022-03-20 21:10:12,460 INFO L226 Difference]: Without dead ends: 1207 [2022-03-20 21:10:12,462 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=226, Invalid=826, Unknown=4, NotChecked=0, Total=1056 [2022-03-20 21:10:12,462 INFO L913 BasicCegarLoop]: 85 mSDtfsCounter, 48 mSDsluCounter, 568 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 653 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 21:10:12,462 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 653 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 411 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 21:10:12,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1207 states. [2022-03-20 21:10:12,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1207 to 977. [2022-03-20 21:10:12,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 977 states, 537 states have (on average 1.2122905027932962) internal successors, (651), 550 states have internal predecessors, (651), 389 states have call successors, (389), 51 states have call predecessors, (389), 50 states have return successors, (387), 375 states have call predecessors, (387), 387 states have call successors, (387) [2022-03-20 21:10:12,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 977 states to 977 states and 1427 transitions. [2022-03-20 21:10:12,796 INFO L78 Accepts]: Start accepts. Automaton has 977 states and 1427 transitions. Word has length 135 [2022-03-20 21:10:12,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:10:12,796 INFO L478 AbstractCegarLoop]: Abstraction has 977 states and 1427 transitions. [2022-03-20 21:10:12,796 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 7 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 6 states have call predecessors, (21), 6 states have call successors, (21) [2022-03-20 21:10:12,796 INFO L276 IsEmpty]: Start isEmpty. Operand 977 states and 1427 transitions. [2022-03-20 21:10:12,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-03-20 21:10:12,797 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:10:12,797 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1] [2022-03-20 21:10:12,814 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-03-20 21:10:12,998 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:10:12,998 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:10:12,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:10:12,998 INFO L85 PathProgramCache]: Analyzing trace with hash -2035738456, now seen corresponding path program 23 times [2022-03-20 21:10:12,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:10:12,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1016292545] [2022-03-20 21:10:12,999 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:10:12,999 INFO L85 PathProgramCache]: Analyzing trace with hash -2035738456, now seen corresponding path program 24 times [2022-03-20 21:10:12,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:10:12,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499214899] [2022-03-20 21:10:12,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:10:12,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:10:13,006 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:10:13,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1137546715] [2022-03-20 21:10:13,006 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 21:10:13,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:10:13,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:10:13,009 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 21:10:13,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-20 21:10:13,087 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-03-20 21:10:13,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:10:13,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 104 conjunts are in the unsatisfiable core [2022-03-20 21:10:13,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:10:15,061 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:10:15,062 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:10:15,625 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 115 proven. 126 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2022-03-20 21:10:15,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:10:20,839 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:10:22,270 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:10:38,511 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 101 proven. 104 refuted. 0 times theorem prover too weak. 387 trivial. 0 not checked. [2022-03-20 21:10:38,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:10:38,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499214899] [2022-03-20 21:10:38,512 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:10:38,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137546715] [2022-03-20 21:10:38,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137546715] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:10:38,512 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:10:38,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 41 [2022-03-20 21:10:38,512 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:10:38,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1016292545] [2022-03-20 21:10:38,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1016292545] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:10:38,512 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:10:38,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-03-20 21:10:38,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8130257] [2022-03-20 21:10:38,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:10:38,513 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-20 21:10:38,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:10:38,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-20 21:10:38,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=1397, Unknown=0, NotChecked=0, Total=1640 [2022-03-20 21:10:38,514 INFO L87 Difference]: Start difference. First operand 977 states and 1427 transitions. Second operand has 24 states, 23 states have (on average 2.0) internal successors, (46), 20 states have internal predecessors, (46), 8 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) [2022-03-20 21:10:43,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:10:43,276 INFO L93 Difference]: Finished difference Result 1127 states and 1617 transitions. [2022-03-20 21:10:43,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-20 21:10:43,277 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 20 states have internal predecessors, (46), 8 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) Word has length 138 [2022-03-20 21:10:43,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:10:43,281 INFO L225 Difference]: With dead ends: 1127 [2022-03-20 21:10:43,281 INFO L226 Difference]: Without dead ends: 1009 [2022-03-20 21:10:43,282 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 232 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 734 ImplicationChecksByTransitivity, 22.4s TimeCoverageRelationStatistics Valid=455, Invalid=2515, Unknown=0, NotChecked=0, Total=2970 [2022-03-20 21:10:43,283 INFO L913 BasicCegarLoop]: 52 mSDtfsCounter, 103 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 1178 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 1336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 1178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-20 21:10:43,283 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 507 Invalid, 1336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 1178 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-20 21:10:43,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1009 states. [2022-03-20 21:10:43,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1009 to 985. [2022-03-20 21:10:43,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 985 states, 543 states have (on average 1.2081031307550645) internal successors, (656), 556 states have internal predecessors, (656), 389 states have call successors, (389), 53 states have call predecessors, (389), 52 states have return successors, (387), 375 states have call predecessors, (387), 387 states have call successors, (387) [2022-03-20 21:10:43,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 1432 transitions. [2022-03-20 21:10:43,635 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 1432 transitions. Word has length 138 [2022-03-20 21:10:43,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:10:43,635 INFO L478 AbstractCegarLoop]: Abstraction has 985 states and 1432 transitions. [2022-03-20 21:10:43,635 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 20 states have internal predecessors, (46), 8 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) [2022-03-20 21:10:43,635 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 1432 transitions. [2022-03-20 21:10:43,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-03-20 21:10:43,637 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:10:43,637 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1] [2022-03-20 21:10:43,656 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-03-20 21:10:43,847 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-03-20 21:10:43,847 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:10:43,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:10:43,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1937049344, now seen corresponding path program 25 times [2022-03-20 21:10:43,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:10:43,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [34021239] [2022-03-20 21:10:43,848 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:10:43,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1937049344, now seen corresponding path program 26 times [2022-03-20 21:10:43,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:10:43,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507342549] [2022-03-20 21:10:43,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:10:43,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:10:43,855 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:10:43,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1333794183] [2022-03-20 21:10:43,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 21:10:43,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:10:43,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:10:43,857 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 21:10:43,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-20 21:10:43,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 21:10:43,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:10:43,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 93 conjunts are in the unsatisfiable core [2022-03-20 21:10:43,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:10:44,996 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:10:45,001 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:11:20,972 WARN L232 SmtUtils]: Spent 23.65s on a formula simplification that was a NOOP. DAG size: 107 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 21:12:21,461 WARN L232 SmtUtils]: Spent 23.76s on a formula simplification. DAG size of input: 102 DAG size of output: 100 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 21:12:30,753 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 163 proven. 69 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2022-03-20 21:12:30,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:12:51,672 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:12:57,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:12:57,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507342549] [2022-03-20 21:12:57,444 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:12:57,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333794183] [2022-03-20 21:12:57,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333794183] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 21:12:57,444 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 21:12:57,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2022-03-20 21:12:57,445 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:12:57,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [34021239] [2022-03-20 21:12:57,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [34021239] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:12:57,445 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:12:57,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-20 21:12:57,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340310000] [2022-03-20 21:12:57,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:12:57,445 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-20 21:12:57,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:12:57,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-20 21:12:57,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=784, Unknown=21, NotChecked=0, Total=930 [2022-03-20 21:12:57,446 INFO L87 Difference]: Start difference. First operand 985 states and 1432 transitions. Second operand has 21 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 7 states have call successors, (21) [2022-03-20 21:13:05,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:13:05,585 INFO L93 Difference]: Finished difference Result 1049 states and 1514 transitions. [2022-03-20 21:13:05,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-20 21:13:05,586 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 7 states have call successors, (21) Word has length 138 [2022-03-20 21:13:05,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:13:05,589 INFO L225 Difference]: With dead ends: 1049 [2022-03-20 21:13:05,590 INFO L226 Difference]: Without dead ends: 1046 [2022-03-20 21:13:05,590 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 162 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 116.9s TimeCoverageRelationStatistics Valid=186, Invalid=1198, Unknown=22, NotChecked=0, Total=1406 [2022-03-20 21:13:05,591 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 66 mSDsluCounter, 652 mSDsCounter, 0 mSdLazyCounter, 934 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 710 SdHoareTripleChecker+Invalid, 1165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 934 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 153 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-03-20 21:13:05,591 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 710 Invalid, 1165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 934 Invalid, 0 Unknown, 153 Unchecked, 2.3s Time] [2022-03-20 21:13:05,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1046 states. [2022-03-20 21:13:05,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1046 to 1021. [2022-03-20 21:13:05,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1021 states, 564 states have (on average 1.2074468085106382) internal successors, (681), 577 states have internal predecessors, (681), 401 states have call successors, (401), 56 states have call predecessors, (401), 55 states have return successors, (399), 387 states have call predecessors, (399), 399 states have call successors, (399) [2022-03-20 21:13:05,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1021 states to 1021 states and 1481 transitions. [2022-03-20 21:13:05,927 INFO L78 Accepts]: Start accepts. Automaton has 1021 states and 1481 transitions. Word has length 138 [2022-03-20 21:13:05,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:13:05,927 INFO L478 AbstractCegarLoop]: Abstraction has 1021 states and 1481 transitions. [2022-03-20 21:13:05,927 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 7 states have call successors, (21) [2022-03-20 21:13:05,927 INFO L276 IsEmpty]: Start isEmpty. Operand 1021 states and 1481 transitions. [2022-03-20 21:13:05,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-03-20 21:13:05,929 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:13:05,929 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1] [2022-03-20 21:13:05,948 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-20 21:13:06,138 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:13:06,139 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:13:06,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:13:06,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1588704448, now seen corresponding path program 27 times [2022-03-20 21:13:06,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:13:06,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1641770803] [2022-03-20 21:13:06,140 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:13:06,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1588704448, now seen corresponding path program 28 times [2022-03-20 21:13:06,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:13:06,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179075781] [2022-03-20 21:13:06,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:13:06,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:13:06,146 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:13:06,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1456384647] [2022-03-20 21:13:06,146 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 21:13:06,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:13:06,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:13:06,149 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 21:13:06,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-20 21:13:06,219 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 21:13:06,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:13:06,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 103 conjunts are in the unsatisfiable core [2022-03-20 21:13:06,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:13:08,253 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:13:08,343 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 146 proven. 122 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2022-03-20 21:13:08,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:13:10,516 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:13:16,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:13:16,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179075781] [2022-03-20 21:13:16,508 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:13:16,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456384647] [2022-03-20 21:13:16,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456384647] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 21:13:16,509 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 21:13:16,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2022-03-20 21:13:16,509 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:13:16,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1641770803] [2022-03-20 21:13:16,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1641770803] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:13:16,509 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:13:16,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-20 21:13:16,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938155137] [2022-03-20 21:13:16,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:13:16,510 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-20 21:13:16,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:13:16,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-20 21:13:16,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=757, Unknown=0, NotChecked=0, Total=870 [2022-03-20 21:13:16,510 INFO L87 Difference]: Start difference. First operand 1021 states and 1481 transitions. Second operand has 21 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 7 states have call successors, (21) [2022-03-20 21:13:25,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:13:25,517 INFO L93 Difference]: Finished difference Result 1140 states and 1645 transitions. [2022-03-20 21:13:25,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-20 21:13:25,518 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 7 states have call successors, (21) Word has length 138 [2022-03-20 21:13:25,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:13:25,522 INFO L225 Difference]: With dead ends: 1140 [2022-03-20 21:13:25,523 INFO L226 Difference]: Without dead ends: 1137 [2022-03-20 21:13:25,523 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 141 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=202, Invalid=1358, Unknown=0, NotChecked=0, Total=1560 [2022-03-20 21:13:25,524 INFO L913 BasicCegarLoop]: 72 mSDtfsCounter, 84 mSDsluCounter, 843 mSDsCounter, 0 mSdLazyCounter, 1306 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 915 SdHoareTripleChecker+Invalid, 1407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-03-20 21:13:25,524 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 915 Invalid, 1407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1306 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-03-20 21:13:25,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1137 states. [2022-03-20 21:13:25,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1137 to 1107. [2022-03-20 21:13:25,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1107 states, 612 states have (on average 1.2058823529411764) internal successors, (738), 627 states have internal predecessors, (738), 434 states have call successors, (434), 61 states have call predecessors, (434), 60 states have return successors, (432), 418 states have call predecessors, (432), 432 states have call successors, (432) [2022-03-20 21:13:25,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1107 states to 1107 states and 1604 transitions. [2022-03-20 21:13:25,893 INFO L78 Accepts]: Start accepts. Automaton has 1107 states and 1604 transitions. Word has length 138 [2022-03-20 21:13:25,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:13:25,893 INFO L478 AbstractCegarLoop]: Abstraction has 1107 states and 1604 transitions. [2022-03-20 21:13:25,893 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 7 states have call successors, (21) [2022-03-20 21:13:25,894 INFO L276 IsEmpty]: Start isEmpty. Operand 1107 states and 1604 transitions. [2022-03-20 21:13:25,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-03-20 21:13:25,895 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:13:25,895 INFO L499 BasicCegarLoop]: trace histogram [19, 18, 18, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:13:25,922 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-20 21:13:26,119 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:13:26,119 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:13:26,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:13:26,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1922165913, now seen corresponding path program 7 times [2022-03-20 21:13:26,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:13:26,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [670438105] [2022-03-20 21:13:26,120 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:13:26,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1922165913, now seen corresponding path program 8 times [2022-03-20 21:13:26,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:13:26,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752254141] [2022-03-20 21:13:26,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:13:26,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:13:26,126 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:13:26,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [544958730] [2022-03-20 21:13:26,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 21:13:26,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:13:26,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:13:26,128 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 21:13:26,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-20 21:13:26,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 21:13:26,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:13:26,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-20 21:13:26,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:13:26,516 INFO L134 CoverageAnalysis]: Checked inductivity of 732 backedges. 181 proven. 48 refuted. 0 times theorem prover too weak. 503 trivial. 0 not checked. [2022-03-20 21:13:26,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:13:26,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:13:26,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752254141] [2022-03-20 21:13:26,961 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:13:26,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544958730] [2022-03-20 21:13:26,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544958730] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 21:13:26,961 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 21:13:26,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-03-20 21:13:26,962 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:13:26,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [670438105] [2022-03-20 21:13:26,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [670438105] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:13:26,962 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:13:26,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 21:13:26,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357721296] [2022-03-20 21:13:26,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:13:26,962 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 21:13:26,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:13:26,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 21:13:26,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2022-03-20 21:13:26,963 INFO L87 Difference]: Start difference. First operand 1107 states and 1604 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 7 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 7 states have call predecessors, (23), 7 states have call successors, (23) [2022-03-20 21:13:27,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:13:27,906 INFO L93 Difference]: Finished difference Result 1693 states and 2485 transitions. [2022-03-20 21:13:27,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 21:13:27,907 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 7 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 7 states have call predecessors, (23), 7 states have call successors, (23) Word has length 143 [2022-03-20 21:13:27,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:13:27,913 INFO L225 Difference]: With dead ends: 1693 [2022-03-20 21:13:27,913 INFO L226 Difference]: Without dead ends: 1201 [2022-03-20 21:13:27,915 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=240, Invalid=950, Unknown=0, NotChecked=0, Total=1190 [2022-03-20 21:13:27,916 INFO L913 BasicCegarLoop]: 80 mSDtfsCounter, 52 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 562 SdHoareTripleChecker+Invalid, 500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 21:13:27,916 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 562 Invalid, 500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 21:13:27,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1201 states. [2022-03-20 21:13:28,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1201 to 1173. [2022-03-20 21:13:28,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1173 states, 634 states have (on average 1.1987381703470033) internal successors, (760), 649 states have internal predecessors, (760), 478 states have call successors, (478), 61 states have call predecessors, (478), 60 states have return successors, (476), 462 states have call predecessors, (476), 476 states have call successors, (476) [2022-03-20 21:13:28,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1173 states to 1173 states and 1714 transitions. [2022-03-20 21:13:28,334 INFO L78 Accepts]: Start accepts. Automaton has 1173 states and 1714 transitions. Word has length 143 [2022-03-20 21:13:28,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:13:28,334 INFO L478 AbstractCegarLoop]: Abstraction has 1173 states and 1714 transitions. [2022-03-20 21:13:28,334 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 7 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 7 states have call predecessors, (23), 7 states have call successors, (23) [2022-03-20 21:13:28,334 INFO L276 IsEmpty]: Start isEmpty. Operand 1173 states and 1714 transitions. [2022-03-20 21:13:28,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-03-20 21:13:28,335 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:13:28,335 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:13:28,352 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-03-20 21:13:28,536 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-03-20 21:13:28,536 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:13:28,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:13:28,536 INFO L85 PathProgramCache]: Analyzing trace with hash -20730755, now seen corresponding path program 29 times [2022-03-20 21:13:28,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:13:28,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1976820594] [2022-03-20 21:13:28,537 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:13:28,537 INFO L85 PathProgramCache]: Analyzing trace with hash -20730755, now seen corresponding path program 30 times [2022-03-20 21:13:28,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:13:28,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152275144] [2022-03-20 21:13:28,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:13:28,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:13:28,543 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:13:28,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1163532777] [2022-03-20 21:13:28,544 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 21:13:28,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:13:28,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:13:28,545 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 21:13:28,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-20 21:13:28,637 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-20 21:13:28,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:13:28,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 104 conjunts are in the unsatisfiable core [2022-03-20 21:13:28,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:13:30,364 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:13:30,367 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:13:32,375 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 135 proven. 128 refuted. 0 times theorem prover too weak. 339 trivial. 0 not checked. [2022-03-20 21:13:32,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:13:42,011 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:13:42,012 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:13:46,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:13:46,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152275144] [2022-03-20 21:13:46,579 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:13:46,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163532777] [2022-03-20 21:13:46,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163532777] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 21:13:46,579 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 21:13:46,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2022-03-20 21:13:46,580 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:13:46,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1976820594] [2022-03-20 21:13:46,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1976820594] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:13:46,580 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:13:46,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-20 21:13:46,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232163903] [2022-03-20 21:13:46,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:13:46,580 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-20 21:13:46,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:13:46,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-20 21:13:46,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=884, Unknown=5, NotChecked=0, Total=1056 [2022-03-20 21:13:46,581 INFO L87 Difference]: Start difference. First operand 1173 states and 1714 transitions. Second operand has 22 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) [2022-03-20 21:13:51,808 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 21:13:53,571 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 21:13:54,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:13:54,832 INFO L93 Difference]: Finished difference Result 1295 states and 1883 transitions. [2022-03-20 21:13:54,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-20 21:13:54,833 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) Word has length 141 [2022-03-20 21:13:54,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:13:54,838 INFO L225 Difference]: With dead ends: 1295 [2022-03-20 21:13:54,838 INFO L226 Difference]: Without dead ends: 1288 [2022-03-20 21:13:54,839 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 166 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 15.9s TimeCoverageRelationStatistics Valid=239, Invalid=1316, Unknown=5, NotChecked=0, Total=1560 [2022-03-20 21:13:54,839 INFO L913 BasicCegarLoop]: 59 mSDtfsCounter, 75 mSDsluCounter, 868 mSDsCounter, 0 mSdLazyCounter, 1353 mSolverCounterSat, 71 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 927 SdHoareTripleChecker+Invalid, 1425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1353 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2022-03-20 21:13:54,839 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 927 Invalid, 1425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1353 Invalid, 1 Unknown, 0 Unchecked, 5.7s Time] [2022-03-20 21:13:54,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1288 states. [2022-03-20 21:13:55,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1288 to 1254. [2022-03-20 21:13:55,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1254 states, 678 states have (on average 1.1991150442477876) internal successors, (813), 693 states have internal predecessors, (813), 512 states have call successors, (512), 64 states have call predecessors, (512), 63 states have return successors, (510), 496 states have call predecessors, (510), 510 states have call successors, (510) [2022-03-20 21:13:55,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1254 states to 1254 states and 1835 transitions. [2022-03-20 21:13:55,266 INFO L78 Accepts]: Start accepts. Automaton has 1254 states and 1835 transitions. Word has length 141 [2022-03-20 21:13:55,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:13:55,266 INFO L478 AbstractCegarLoop]: Abstraction has 1254 states and 1835 transitions. [2022-03-20 21:13:55,266 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) [2022-03-20 21:13:55,266 INFO L276 IsEmpty]: Start isEmpty. Operand 1254 states and 1835 transitions. [2022-03-20 21:13:55,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-03-20 21:13:55,268 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:13:55,268 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:13:55,291 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-03-20 21:13:55,491 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-03-20 21:13:55,491 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:13:55,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:13:55,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1824189762, now seen corresponding path program 31 times [2022-03-20 21:13:55,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:13:55,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1332962390] [2022-03-20 21:13:55,492 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:13:55,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1824189762, now seen corresponding path program 32 times [2022-03-20 21:13:55,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:13:55,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552342658] [2022-03-20 21:13:55,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:13:55,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:13:55,498 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:13:55,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1285761271] [2022-03-20 21:13:55,498 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 21:13:55,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:13:55,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:13:55,499 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 21:13:55,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-20 21:13:55,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 21:13:55,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:13:55,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 111 conjunts are in the unsatisfiable core [2022-03-20 21:13:55,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:13:56,784 INFO L134 CoverageAnalysis]: Checked inductivity of 608 backedges. 106 proven. 142 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2022-03-20 21:13:56,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:13:57,372 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:14:00,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:14:00,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552342658] [2022-03-20 21:14:00,314 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:14:00,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285761271] [2022-03-20 21:14:00,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285761271] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 21:14:00,315 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 21:14:00,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2022-03-20 21:14:00,315 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:14:00,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1332962390] [2022-03-20 21:14:00,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1332962390] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:14:00,315 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:14:00,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-20 21:14:00,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028430181] [2022-03-20 21:14:00,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:14:00,315 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-20 21:14:00,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:14:00,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-20 21:14:00,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2022-03-20 21:14:00,316 INFO L87 Difference]: Start difference. First operand 1254 states and 1835 transitions. Second operand has 22 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 7 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) [2022-03-20 21:14:02,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:14:02,713 INFO L93 Difference]: Finished difference Result 1406 states and 2050 transitions. [2022-03-20 21:14:02,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-20 21:14:02,714 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 7 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) Word has length 143 [2022-03-20 21:14:02,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:14:02,720 INFO L225 Difference]: With dead ends: 1406 [2022-03-20 21:14:02,720 INFO L226 Difference]: Without dead ends: 1403 [2022-03-20 21:14:02,721 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 135 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=188, Invalid=1534, Unknown=0, NotChecked=0, Total=1722 [2022-03-20 21:14:02,721 INFO L913 BasicCegarLoop]: 72 mSDtfsCounter, 94 mSDsluCounter, 995 mSDsCounter, 0 mSdLazyCounter, 1594 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 1067 SdHoareTripleChecker+Invalid, 1724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 1594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-20 21:14:02,722 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 1067 Invalid, 1724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 1594 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-20 21:14:02,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1403 states. [2022-03-20 21:14:03,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1403 to 1360. [2022-03-20 21:14:03,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1360 states, 733 states have (on average 1.2019099590723057) internal successors, (881), 749 states have internal predecessors, (881), 558 states have call successors, (558), 69 states have call predecessors, (558), 68 states have return successors, (556), 541 states have call predecessors, (556), 556 states have call successors, (556) [2022-03-20 21:14:03,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1360 states to 1360 states and 1995 transitions. [2022-03-20 21:14:03,189 INFO L78 Accepts]: Start accepts. Automaton has 1360 states and 1995 transitions. Word has length 143 [2022-03-20 21:14:03,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:14:03,190 INFO L478 AbstractCegarLoop]: Abstraction has 1360 states and 1995 transitions. [2022-03-20 21:14:03,190 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 7 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) [2022-03-20 21:14:03,190 INFO L276 IsEmpty]: Start isEmpty. Operand 1360 states and 1995 transitions. [2022-03-20 21:14:03,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-03-20 21:14:03,192 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:14:03,192 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:14:03,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-03-20 21:14:03,415 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-03-20 21:14:03,415 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:14:03,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:14:03,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1701564030, now seen corresponding path program 33 times [2022-03-20 21:14:03,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:14:03,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1877071423] [2022-03-20 21:14:03,416 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:14:03,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1701564030, now seen corresponding path program 34 times [2022-03-20 21:14:03,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:14:03,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122910176] [2022-03-20 21:14:03,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:14:03,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:14:03,421 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:14:03,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1309133659] [2022-03-20 21:14:03,421 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 21:14:03,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:14:03,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:14:03,423 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 21:14:03,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-20 21:14:03,487 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 21:14:03,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:14:03,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 94 conjunts are in the unsatisfiable core [2022-03-20 21:14:03,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:14:06,125 INFO L134 CoverageAnalysis]: Checked inductivity of 608 backedges. 119 proven. 102 refuted. 0 times theorem prover too weak. 387 trivial. 0 not checked. [2022-03-20 21:14:06,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:14:06,900 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:14:08,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:14:08,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122910176] [2022-03-20 21:14:08,977 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:14:08,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309133659] [2022-03-20 21:14:08,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309133659] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 21:14:08,978 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 21:14:08,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2022-03-20 21:14:08,978 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:14:08,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1877071423] [2022-03-20 21:14:08,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1877071423] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:14:08,978 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:14:08,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-20 21:14:08,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696327437] [2022-03-20 21:14:08,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:14:08,979 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-20 21:14:08,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:14:08,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-20 21:14:08,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2022-03-20 21:14:08,979 INFO L87 Difference]: Start difference. First operand 1360 states and 1995 transitions. Second operand has 23 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) [2022-03-20 21:14:14,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:14:14,003 INFO L93 Difference]: Finished difference Result 1563 states and 2294 transitions. [2022-03-20 21:14:14,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-20 21:14:14,004 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) Word has length 143 [2022-03-20 21:14:14,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:14:14,010 INFO L225 Difference]: With dead ends: 1563 [2022-03-20 21:14:14,010 INFO L226 Difference]: Without dead ends: 1560 [2022-03-20 21:14:14,011 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 135 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=209, Invalid=1771, Unknown=0, NotChecked=0, Total=1980 [2022-03-20 21:14:14,011 INFO L913 BasicCegarLoop]: 74 mSDtfsCounter, 94 mSDsluCounter, 1147 mSDsCounter, 0 mSdLazyCounter, 1785 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 1221 SdHoareTripleChecker+Invalid, 1897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 1785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-03-20 21:14:14,011 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 1221 Invalid, 1897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 1785 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-03-20 21:14:14,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1560 states. [2022-03-20 21:14:14,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1560 to 1441. [2022-03-20 21:14:14,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1441 states, 777 states have (on average 1.2033462033462032) internal successors, (935), 795 states have internal predecessors, (935), 593 states have call successors, (593), 71 states have call predecessors, (593), 70 states have return successors, (591), 574 states have call predecessors, (591), 591 states have call successors, (591) [2022-03-20 21:14:14,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1441 states to 1441 states and 2119 transitions. [2022-03-20 21:14:14,538 INFO L78 Accepts]: Start accepts. Automaton has 1441 states and 2119 transitions. Word has length 143 [2022-03-20 21:14:14,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:14:14,539 INFO L478 AbstractCegarLoop]: Abstraction has 1441 states and 2119 transitions. [2022-03-20 21:14:14,539 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) [2022-03-20 21:14:14,539 INFO L276 IsEmpty]: Start isEmpty. Operand 1441 states and 2119 transitions. [2022-03-20 21:14:14,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-03-20 21:14:14,541 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:14:14,541 INFO L499 BasicCegarLoop]: trace histogram [18, 17, 17, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:14:14,567 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-03-20 21:14:14,767 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:14:14,767 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:14:14,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:14:14,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1351700721, now seen corresponding path program 9 times [2022-03-20 21:14:14,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:14:14,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1095287552] [2022-03-20 21:14:14,768 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:14:14,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1351700721, now seen corresponding path program 10 times [2022-03-20 21:14:14,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:14:14,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115519130] [2022-03-20 21:14:14,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:14:14,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:14:14,775 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:14:14,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [298528447] [2022-03-20 21:14:14,775 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 21:14:14,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:14:14,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:14:14,779 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 21:14:14,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-20 21:14:14,842 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 21:14:14,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:14:14,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-20 21:14:14,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:14:15,272 INFO L134 CoverageAnalysis]: Checked inductivity of 678 backedges. 132 proven. 47 refuted. 0 times theorem prover too weak. 499 trivial. 0 not checked. [2022-03-20 21:14:15,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:14:19,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:14:19,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115519130] [2022-03-20 21:14:19,600 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:14:19,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298528447] [2022-03-20 21:14:19,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298528447] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 21:14:19,600 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 21:14:19,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-03-20 21:14:19,600 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:14:19,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1095287552] [2022-03-20 21:14:19,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1095287552] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:14:19,600 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:14:19,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 21:14:19,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870641218] [2022-03-20 21:14:19,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:14:19,601 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 21:14:19,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:14:19,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 21:14:19,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=252, Unknown=2, NotChecked=0, Total=306 [2022-03-20 21:14:19,602 INFO L87 Difference]: Start difference. First operand 1441 states and 2119 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 7 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) [2022-03-20 21:14:20,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:14:20,765 INFO L93 Difference]: Finished difference Result 1893 states and 2820 transitions. [2022-03-20 21:14:20,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 21:14:20,766 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 7 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) Word has length 146 [2022-03-20 21:14:20,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:14:20,773 INFO L225 Difference]: With dead ends: 1893 [2022-03-20 21:14:20,773 INFO L226 Difference]: Without dead ends: 1633 [2022-03-20 21:14:20,774 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 192 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=199, Invalid=729, Unknown=2, NotChecked=0, Total=930 [2022-03-20 21:14:20,774 INFO L913 BasicCegarLoop]: 82 mSDtfsCounter, 55 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 21:14:20,774 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 456 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 21:14:20,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1633 states. [2022-03-20 21:14:21,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1633 to 1402. [2022-03-20 21:14:21,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1402 states, 773 states have (on average 1.203104786545925) internal successors, (930), 790 states have internal predecessors, (930), 559 states have call successors, (559), 70 states have call predecessors, (559), 69 states have return successors, (557), 541 states have call predecessors, (557), 557 states have call successors, (557) [2022-03-20 21:14:21,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1402 states to 1402 states and 2046 transitions. [2022-03-20 21:14:21,300 INFO L78 Accepts]: Start accepts. Automaton has 1402 states and 2046 transitions. Word has length 146 [2022-03-20 21:14:21,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:14:21,300 INFO L478 AbstractCegarLoop]: Abstraction has 1402 states and 2046 transitions. [2022-03-20 21:14:21,300 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 7 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) [2022-03-20 21:14:21,300 INFO L276 IsEmpty]: Start isEmpty. Operand 1402 states and 2046 transitions. [2022-03-20 21:14:21,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-03-20 21:14:21,302 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:14:21,302 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1] [2022-03-20 21:14:21,325 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-03-20 21:14:21,515 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-03-20 21:14:21,515 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:14:21,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:14:21,516 INFO L85 PathProgramCache]: Analyzing trace with hash -780316161, now seen corresponding path program 35 times [2022-03-20 21:14:21,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:14:21,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1969494432] [2022-03-20 21:14:21,516 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:14:21,516 INFO L85 PathProgramCache]: Analyzing trace with hash -780316161, now seen corresponding path program 36 times [2022-03-20 21:14:21,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:14:21,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092274464] [2022-03-20 21:14:21,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:14:21,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:14:21,522 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:14:21,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [618114445] [2022-03-20 21:14:21,522 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 21:14:21,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:14:21,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:14:21,524 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 21:14:21,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-20 21:14:21,657 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-20 21:14:21,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:14:21,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 113 conjunts are in the unsatisfiable core [2022-03-20 21:14:21,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:14:23,773 INFO L134 CoverageAnalysis]: Checked inductivity of 620 backedges. 49 proven. 121 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2022-03-20 21:14:23,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:14:33,269 INFO L134 CoverageAnalysis]: Checked inductivity of 620 backedges. 46 proven. 115 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2022-03-20 21:14:33,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:14:33,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092274464] [2022-03-20 21:14:33,269 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:14:33,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618114445] [2022-03-20 21:14:33,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618114445] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:14:33,269 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:14:33,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 23] total 44 [2022-03-20 21:14:33,270 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:14:33,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1969494432] [2022-03-20 21:14:33,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1969494432] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:14:33,270 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:14:33,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-03-20 21:14:33,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639045591] [2022-03-20 21:14:33,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:14:33,270 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-20 21:14:33,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:14:33,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-20 21:14:33,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=1585, Unknown=0, NotChecked=0, Total=1892 [2022-03-20 21:14:33,271 INFO L87 Difference]: Start difference. First operand 1402 states and 2046 transitions. Second operand has 26 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 7 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 6 states have call predecessors, (21), 6 states have call successors, (21) [2022-03-20 21:14:35,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:14:35,963 INFO L93 Difference]: Finished difference Result 1533 states and 2228 transitions. [2022-03-20 21:14:35,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-20 21:14:35,964 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 7 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 6 states have call predecessors, (21), 6 states have call successors, (21) Word has length 146 [2022-03-20 21:14:35,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:14:35,971 INFO L225 Difference]: With dead ends: 1533 [2022-03-20 21:14:35,972 INFO L226 Difference]: Without dead ends: 1530 [2022-03-20 21:14:35,973 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 246 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 859 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=577, Invalid=2963, Unknown=0, NotChecked=0, Total=3540 [2022-03-20 21:14:35,973 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 111 mSDsluCounter, 1008 mSDsCounter, 0 mSdLazyCounter, 2014 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 1068 SdHoareTripleChecker+Invalid, 2120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 2014 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-20 21:14:35,973 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 1068 Invalid, 2120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 2014 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-20 21:14:35,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1530 states. [2022-03-20 21:14:36,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1530 to 1492. [2022-03-20 21:14:36,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1492 states, 823 states have (on average 1.2029161603888214) internal successors, (990), 840 states have internal predecessors, (990), 595 states have call successors, (595), 74 states have call predecessors, (595), 73 states have return successors, (593), 577 states have call predecessors, (593), 593 states have call successors, (593) [2022-03-20 21:14:36,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1492 states to 1492 states and 2178 transitions. [2022-03-20 21:14:36,675 INFO L78 Accepts]: Start accepts. Automaton has 1492 states and 2178 transitions. Word has length 146 [2022-03-20 21:14:36,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:14:36,675 INFO L478 AbstractCegarLoop]: Abstraction has 1492 states and 2178 transitions. [2022-03-20 21:14:36,675 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 7 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 6 states have call predecessors, (21), 6 states have call successors, (21) [2022-03-20 21:14:36,675 INFO L276 IsEmpty]: Start isEmpty. Operand 1492 states and 2178 transitions. [2022-03-20 21:14:36,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-03-20 21:14:36,677 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:14:36,677 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1] [2022-03-20 21:14:36,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-03-20 21:14:36,881 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-03-20 21:14:36,881 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:14:36,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:14:36,881 INFO L85 PathProgramCache]: Analyzing trace with hash 829249481, now seen corresponding path program 37 times [2022-03-20 21:14:36,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:14:36,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [788951659] [2022-03-20 21:14:36,882 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:14:36,882 INFO L85 PathProgramCache]: Analyzing trace with hash 829249481, now seen corresponding path program 38 times [2022-03-20 21:14:36,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:14:36,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18402994] [2022-03-20 21:14:36,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:14:36,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:14:36,888 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:14:36,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [401758668] [2022-03-20 21:14:36,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 21:14:36,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:14:36,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:14:36,889 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 21:14:36,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-20 21:14:36,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 21:14:36,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:14:36,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 117 conjunts are in the unsatisfiable core [2022-03-20 21:14:36,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:14:38,276 INFO L134 CoverageAnalysis]: Checked inductivity of 620 backedges. 142 proven. 118 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2022-03-20 21:14:38,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:14:39,774 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:14:41,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:14:41,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18402994] [2022-03-20 21:14:41,574 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:14:41,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401758668] [2022-03-20 21:14:41,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401758668] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 21:14:41,574 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 21:14:41,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2022-03-20 21:14:41,574 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:14:41,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [788951659] [2022-03-20 21:14:41,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [788951659] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:14:41,574 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:14:41,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-20 21:14:41,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121248502] [2022-03-20 21:14:41,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:14:41,575 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-20 21:14:41,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:14:41,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-20 21:14:41,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=721, Unknown=0, NotChecked=0, Total=812 [2022-03-20 21:14:41,575 INFO L87 Difference]: Start difference. First operand 1492 states and 2178 transitions. Second operand has 22 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 7 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 6 states have call predecessors, (21), 6 states have call successors, (21) [2022-03-20 21:14:45,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:14:45,934 INFO L93 Difference]: Finished difference Result 1706 states and 2488 transitions. [2022-03-20 21:14:45,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-20 21:14:45,935 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 7 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 6 states have call predecessors, (21), 6 states have call successors, (21) Word has length 146 [2022-03-20 21:14:45,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:14:45,942 INFO L225 Difference]: With dead ends: 1706 [2022-03-20 21:14:45,942 INFO L226 Difference]: Without dead ends: 1703 [2022-03-20 21:14:45,943 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 137 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=191, Invalid=1615, Unknown=0, NotChecked=0, Total=1806 [2022-03-20 21:14:45,943 INFO L913 BasicCegarLoop]: 66 mSDtfsCounter, 100 mSDsluCounter, 966 mSDsCounter, 0 mSdLazyCounter, 1650 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 1032 SdHoareTripleChecker+Invalid, 1759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 1650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-03-20 21:14:45,943 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 1032 Invalid, 1759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 1650 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-03-20 21:14:45,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1703 states. [2022-03-20 21:14:46,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1703 to 1584. [2022-03-20 21:14:46,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1584 states, 876 states have (on average 1.2031963470319635) internal successors, (1054), 895 states have internal predecessors, (1054), 630 states have call successors, (630), 78 states have call predecessors, (630), 77 states have return successors, (628), 610 states have call predecessors, (628), 628 states have call successors, (628) [2022-03-20 21:14:46,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1584 states to 1584 states and 2312 transitions. [2022-03-20 21:14:46,612 INFO L78 Accepts]: Start accepts. Automaton has 1584 states and 2312 transitions. Word has length 146 [2022-03-20 21:14:46,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:14:46,613 INFO L478 AbstractCegarLoop]: Abstraction has 1584 states and 2312 transitions. [2022-03-20 21:14:46,613 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 7 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 6 states have call predecessors, (21), 6 states have call successors, (21) [2022-03-20 21:14:46,613 INFO L276 IsEmpty]: Start isEmpty. Operand 1584 states and 2312 transitions. [2022-03-20 21:14:46,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-03-20 21:14:46,615 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:14:46,615 INFO L499 BasicCegarLoop]: trace histogram [18, 17, 17, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-03-20 21:14:46,641 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-03-20 21:14:46,831 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-03-20 21:14:46,831 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:14:46,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:14:46,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1464953460, now seen corresponding path program 11 times [2022-03-20 21:14:46,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:14:46,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [914269246] [2022-03-20 21:14:46,832 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:14:46,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1464953460, now seen corresponding path program 12 times [2022-03-20 21:14:46,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:14:46,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235687178] [2022-03-20 21:14:46,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:14:46,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:14:46,838 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:14:46,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1962802244] [2022-03-20 21:14:46,838 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 21:14:46,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:14:46,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:14:46,842 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 21:14:46,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-20 21:14:46,932 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 21:14:46,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:14:46,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-20 21:14:46,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:14:47,412 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 130 proven. 55 refuted. 0 times theorem prover too weak. 505 trivial. 0 not checked. [2022-03-20 21:14:47,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:14:55,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:14:55,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235687178] [2022-03-20 21:14:55,835 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:14:55,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962802244] [2022-03-20 21:14:55,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962802244] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 21:14:55,836 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 21:14:55,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-03-20 21:14:55,836 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:14:55,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [914269246] [2022-03-20 21:14:55,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [914269246] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:14:55,836 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:14:55,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 21:14:55,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603622908] [2022-03-20 21:14:55,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:14:55,836 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 21:14:55,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:14:55,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 21:14:55,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=350, Unknown=4, NotChecked=0, Total=420 [2022-03-20 21:14:55,837 INFO L87 Difference]: Start difference. First operand 1584 states and 2312 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 6 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2022-03-20 21:14:57,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:14:57,171 INFO L93 Difference]: Finished difference Result 1724 states and 2500 transitions. [2022-03-20 21:14:57,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-20 21:14:57,171 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 6 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) Word has length 149 [2022-03-20 21:14:57,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:14:57,178 INFO L225 Difference]: With dead ends: 1724 [2022-03-20 21:14:57,178 INFO L226 Difference]: Without dead ends: 1510 [2022-03-20 21:14:57,179 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 173 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=304, Invalid=1332, Unknown=4, NotChecked=0, Total=1640 [2022-03-20 21:14:57,179 INFO L913 BasicCegarLoop]: 74 mSDtfsCounter, 86 mSDsluCounter, 610 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 684 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 21:14:57,180 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 684 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 487 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 21:14:57,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1510 states. [2022-03-20 21:14:57,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1510 to 1495. [2022-03-20 21:14:57,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1495 states, 826 states have (on average 1.202179176755448) internal successors, (993), 843 states have internal predecessors, (993), 595 states have call successors, (595), 74 states have call predecessors, (595), 73 states have return successors, (593), 577 states have call predecessors, (593), 593 states have call successors, (593) [2022-03-20 21:14:57,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1495 states to 1495 states and 2181 transitions. [2022-03-20 21:14:57,808 INFO L78 Accepts]: Start accepts. Automaton has 1495 states and 2181 transitions. Word has length 149 [2022-03-20 21:14:57,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:14:57,808 INFO L478 AbstractCegarLoop]: Abstraction has 1495 states and 2181 transitions. [2022-03-20 21:14:57,808 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 6 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2022-03-20 21:14:57,808 INFO L276 IsEmpty]: Start isEmpty. Operand 1495 states and 2181 transitions. [2022-03-20 21:14:57,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-03-20 21:14:57,811 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:14:57,811 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 7, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:14:57,837 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-03-20 21:14:58,028 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-03-20 21:14:58,029 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:14:58,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:14:58,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1748446329, now seen corresponding path program 39 times [2022-03-20 21:14:58,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:14:58,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1967704874] [2022-03-20 21:14:58,030 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:14:58,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1748446329, now seen corresponding path program 40 times [2022-03-20 21:14:58,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:14:58,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685262664] [2022-03-20 21:14:58,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:14:58,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:14:58,036 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:14:58,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1266710794] [2022-03-20 21:14:58,036 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 21:14:58,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:14:58,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:14:58,037 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 21:14:58,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-20 21:14:58,126 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 21:14:58,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:14:58,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 127 conjunts are in the unsatisfiable core [2022-03-20 21:14:58,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:14:58,502 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:15:00,621 INFO L134 CoverageAnalysis]: Checked inductivity of 643 backedges. 145 proven. 138 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2022-03-20 21:15:00,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:15:01,664 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:15:03,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:15:03,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685262664] [2022-03-20 21:15:03,244 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:15:03,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266710794] [2022-03-20 21:15:03,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266710794] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 21:15:03,244 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 21:15:03,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2022-03-20 21:15:03,245 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:15:03,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1967704874] [2022-03-20 21:15:03,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1967704874] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:15:03,245 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:15:03,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-03-20 21:15:03,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211808741] [2022-03-20 21:15:03,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:15:03,245 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-20 21:15:03,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:15:03,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-20 21:15:03,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=955, Unknown=0, NotChecked=0, Total=1056 [2022-03-20 21:15:03,246 INFO L87 Difference]: Start difference. First operand 1495 states and 2181 transitions. Second operand has 26 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 24 states have internal predecessors, (56), 9 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 8 states have call successors, (21) [2022-03-20 21:15:08,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:15:08,901 INFO L93 Difference]: Finished difference Result 1646 states and 2386 transitions. [2022-03-20 21:15:08,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-20 21:15:08,902 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 24 states have internal predecessors, (56), 9 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 8 states have call successors, (21) Word has length 151 [2022-03-20 21:15:08,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:15:08,908 INFO L225 Difference]: With dead ends: 1646 [2022-03-20 21:15:08,908 INFO L226 Difference]: Without dead ends: 1643 [2022-03-20 21:15:08,909 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 139 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=189, Invalid=1881, Unknown=0, NotChecked=0, Total=2070 [2022-03-20 21:15:08,909 INFO L913 BasicCegarLoop]: 75 mSDtfsCounter, 119 mSDsluCounter, 1125 mSDsCounter, 0 mSdLazyCounter, 1910 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 1200 SdHoareTripleChecker+Invalid, 2053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 1910 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-03-20 21:15:08,909 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 1200 Invalid, 2053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 1910 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-03-20 21:15:08,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1643 states. [2022-03-20 21:15:09,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1643 to 1594. [2022-03-20 21:15:09,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1594 states, 882 states have (on average 1.2018140589569162) internal successors, (1060), 901 states have internal predecessors, (1060), 632 states have call successors, (632), 80 states have call predecessors, (632), 79 states have return successors, (630), 612 states have call predecessors, (630), 630 states have call successors, (630) [2022-03-20 21:15:09,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1594 states to 1594 states and 2322 transitions. [2022-03-20 21:15:09,626 INFO L78 Accepts]: Start accepts. Automaton has 1594 states and 2322 transitions. Word has length 151 [2022-03-20 21:15:09,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:15:09,626 INFO L478 AbstractCegarLoop]: Abstraction has 1594 states and 2322 transitions. [2022-03-20 21:15:09,626 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 24 states have internal predecessors, (56), 9 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 8 states have call successors, (21) [2022-03-20 21:15:09,626 INFO L276 IsEmpty]: Start isEmpty. Operand 1594 states and 2322 transitions. [2022-03-20 21:15:09,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-03-20 21:15:09,629 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:15:09,629 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:15:09,657 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-03-20 21:15:09,852 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:15:09,852 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:15:09,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:15:09,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1293461113, now seen corresponding path program 41 times [2022-03-20 21:15:09,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:15:09,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [676157717] [2022-03-20 21:15:09,853 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:15:09,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1293461113, now seen corresponding path program 42 times [2022-03-20 21:15:09,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:15:09,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199871083] [2022-03-20 21:15:09,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:15:09,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:15:09,861 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:15:09,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2123666484] [2022-03-20 21:15:09,861 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 21:15:09,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:15:09,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:15:09,863 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 21:15:09,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-20 21:15:09,952 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-03-20 21:15:09,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:15:09,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-20 21:15:09,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:15:10,446 INFO L134 CoverageAnalysis]: Checked inductivity of 893 backedges. 40 proven. 78 refuted. 0 times theorem prover too weak. 775 trivial. 0 not checked. [2022-03-20 21:15:10,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:15:11,609 INFO L134 CoverageAnalysis]: Checked inductivity of 893 backedges. 79 proven. 39 refuted. 0 times theorem prover too weak. 775 trivial. 0 not checked. [2022-03-20 21:15:11,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:15:11,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199871083] [2022-03-20 21:15:11,609 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:15:11,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123666484] [2022-03-20 21:15:11,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123666484] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:15:11,609 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:15:11,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 25 [2022-03-20 21:15:11,610 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:15:11,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [676157717] [2022-03-20 21:15:11,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [676157717] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:15:11,610 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:15:11,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 21:15:11,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856772198] [2022-03-20 21:15:11,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:15:11,610 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 21:15:11,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:15:11,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 21:15:11,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2022-03-20 21:15:11,611 INFO L87 Difference]: Start difference. First operand 1594 states and 2322 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 8 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) [2022-03-20 21:15:13,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:15:13,699 INFO L93 Difference]: Finished difference Result 1823 states and 2683 transitions. [2022-03-20 21:15:13,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-20 21:15:13,700 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 8 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) Word has length 155 [2022-03-20 21:15:13,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:15:13,705 INFO L225 Difference]: With dead ends: 1823 [2022-03-20 21:15:13,705 INFO L226 Difference]: Without dead ends: 1813 [2022-03-20 21:15:13,706 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 283 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=587, Invalid=1765, Unknown=0, NotChecked=0, Total=2352 [2022-03-20 21:15:13,706 INFO L913 BasicCegarLoop]: 123 mSDtfsCounter, 106 mSDsluCounter, 558 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 259 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 681 SdHoareTripleChecker+Invalid, 753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 259 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-20 21:15:13,706 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 681 Invalid, 753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [259 Valid, 494 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-20 21:15:13,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1813 states. [2022-03-20 21:15:14,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1813 to 1741. [2022-03-20 21:15:14,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1741 states, 957 states have (on average 1.2048066875653083) internal successors, (1153), 978 states have internal predecessors, (1153), 704 states have call successors, (704), 80 states have call predecessors, (704), 79 states have return successors, (702), 682 states have call predecessors, (702), 702 states have call successors, (702) [2022-03-20 21:15:14,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1741 states to 1741 states and 2559 transitions. [2022-03-20 21:15:14,496 INFO L78 Accepts]: Start accepts. Automaton has 1741 states and 2559 transitions. Word has length 155 [2022-03-20 21:15:14,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:15:14,496 INFO L478 AbstractCegarLoop]: Abstraction has 1741 states and 2559 transitions. [2022-03-20 21:15:14,496 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 8 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) [2022-03-20 21:15:14,496 INFO L276 IsEmpty]: Start isEmpty. Operand 1741 states and 2559 transitions. [2022-03-20 21:15:14,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-03-20 21:15:14,498 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:15:14,498 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:15:14,515 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-03-20 21:15:14,699 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:15:14,699 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:15:14,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:15:14,699 INFO L85 PathProgramCache]: Analyzing trace with hash -624413815, now seen corresponding path program 43 times [2022-03-20 21:15:14,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:15:14,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1488087419] [2022-03-20 21:15:14,700 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:15:14,700 INFO L85 PathProgramCache]: Analyzing trace with hash -624413815, now seen corresponding path program 44 times [2022-03-20 21:15:14,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:15:14,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978355402] [2022-03-20 21:15:14,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:15:14,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:15:14,705 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:15:14,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [824100633] [2022-03-20 21:15:14,705 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 21:15:14,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:15:14,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:15:14,706 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 21:15:14,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-20 21:15:14,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 21:15:14,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:15:14,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-20 21:15:14,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:15:15,279 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 50 proven. 79 refuted. 0 times theorem prover too weak. 775 trivial. 0 not checked. [2022-03-20 21:15:15,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:15:15,862 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 48 proven. 81 refuted. 0 times theorem prover too weak. 775 trivial. 0 not checked. [2022-03-20 21:15:15,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:15:15,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978355402] [2022-03-20 21:15:15,863 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:15:15,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824100633] [2022-03-20 21:15:15,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824100633] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:15:15,863 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:15:15,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2022-03-20 21:15:15,863 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:15:15,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1488087419] [2022-03-20 21:15:15,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1488087419] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:15:15,863 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:15:15,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 21:15:15,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792809435] [2022-03-20 21:15:15,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:15:15,864 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 21:15:15,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:15:15,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 21:15:15,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2022-03-20 21:15:15,865 INFO L87 Difference]: Start difference. First operand 1741 states and 2559 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 8 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) [2022-03-20 21:15:17,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:15:17,916 INFO L93 Difference]: Finished difference Result 2803 states and 4297 transitions. [2022-03-20 21:15:17,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 21:15:17,918 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 8 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) Word has length 160 [2022-03-20 21:15:17,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:15:17,926 INFO L225 Difference]: With dead ends: 2803 [2022-03-20 21:15:17,926 INFO L226 Difference]: Without dead ends: 2528 [2022-03-20 21:15:17,927 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 296 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=252, Invalid=1154, Unknown=0, NotChecked=0, Total=1406 [2022-03-20 21:15:17,928 INFO L913 BasicCegarLoop]: 104 mSDtfsCounter, 61 mSDsluCounter, 751 mSDsCounter, 0 mSdLazyCounter, 612 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 855 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 21:15:17,928 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 855 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 612 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 21:15:17,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2528 states. [2022-03-20 21:15:18,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2528 to 2050. [2022-03-20 21:15:18,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2050 states, 1098 states have (on average 1.2167577413479054) internal successors, (1336), 1119 states have internal predecessors, (1336), 872 states have call successors, (872), 80 states have call predecessors, (872), 79 states have return successors, (870), 850 states have call predecessors, (870), 870 states have call successors, (870) [2022-03-20 21:15:18,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2050 states to 2050 states and 3078 transitions. [2022-03-20 21:15:18,901 INFO L78 Accepts]: Start accepts. Automaton has 2050 states and 3078 transitions. Word has length 160 [2022-03-20 21:15:18,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:15:18,901 INFO L478 AbstractCegarLoop]: Abstraction has 2050 states and 3078 transitions. [2022-03-20 21:15:18,901 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 8 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) [2022-03-20 21:15:18,901 INFO L276 IsEmpty]: Start isEmpty. Operand 2050 states and 3078 transitions. [2022-03-20 21:15:18,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-03-20 21:15:18,903 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:15:18,903 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:15:18,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-03-20 21:15:19,103 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-03-20 21:15:19,103 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:15:19,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:15:19,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1428542047, now seen corresponding path program 45 times [2022-03-20 21:15:19,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:15:19,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [52760992] [2022-03-20 21:15:19,104 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:15:19,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1428542047, now seen corresponding path program 46 times [2022-03-20 21:15:19,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:15:19,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915722375] [2022-03-20 21:15:19,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:15:19,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:15:19,111 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:15:19,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [277989344] [2022-03-20 21:15:19,111 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 21:15:19,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:15:19,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:15:19,113 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 21:15:19,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-20 21:15:19,169 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 21:15:19,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:15:19,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-20 21:15:19,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:15:19,816 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 45 proven. 84 refuted. 0 times theorem prover too weak. 775 trivial. 0 not checked. [2022-03-20 21:15:19,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:15:20,834 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 45 proven. 84 refuted. 0 times theorem prover too weak. 775 trivial. 0 not checked. [2022-03-20 21:15:20,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:15:20,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915722375] [2022-03-20 21:15:20,834 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:15:20,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277989344] [2022-03-20 21:15:20,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277989344] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:15:20,835 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:15:20,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2022-03-20 21:15:20,835 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:15:20,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [52760992] [2022-03-20 21:15:20,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [52760992] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:15:20,835 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:15:20,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 21:15:20,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945848639] [2022-03-20 21:15:20,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:15:20,835 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 21:15:20,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:15:20,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 21:15:20,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=708, Unknown=0, NotChecked=0, Total=812 [2022-03-20 21:15:20,836 INFO L87 Difference]: Start difference. First operand 2050 states and 3078 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 8 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) [2022-03-20 21:15:22,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:15:22,919 INFO L93 Difference]: Finished difference Result 2099 states and 3145 transitions. [2022-03-20 21:15:22,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-20 21:15:22,920 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 8 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) Word has length 160 [2022-03-20 21:15:22,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:15:22,926 INFO L225 Difference]: With dead ends: 2099 [2022-03-20 21:15:22,926 INFO L226 Difference]: Without dead ends: 2089 [2022-03-20 21:15:22,927 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 292 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=304, Invalid=1676, Unknown=0, NotChecked=0, Total=1980 [2022-03-20 21:15:22,927 INFO L913 BasicCegarLoop]: 107 mSDtfsCounter, 93 mSDsluCounter, 845 mSDsCounter, 0 mSdLazyCounter, 655 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 952 SdHoareTripleChecker+Invalid, 812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-20 21:15:22,927 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 952 Invalid, 812 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 655 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-20 21:15:22,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2089 states. [2022-03-20 21:15:23,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2089 to 2050. [2022-03-20 21:15:23,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2050 states, 1098 states have (on average 1.215846994535519) internal successors, (1335), 1119 states have internal predecessors, (1335), 872 states have call successors, (872), 80 states have call predecessors, (872), 79 states have return successors, (870), 850 states have call predecessors, (870), 870 states have call successors, (870) [2022-03-20 21:15:23,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2050 states to 2050 states and 3077 transitions. [2022-03-20 21:15:23,801 INFO L78 Accepts]: Start accepts. Automaton has 2050 states and 3077 transitions. Word has length 160 [2022-03-20 21:15:23,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:15:23,801 INFO L478 AbstractCegarLoop]: Abstraction has 2050 states and 3077 transitions. [2022-03-20 21:15:23,801 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 8 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) [2022-03-20 21:15:23,802 INFO L276 IsEmpty]: Start isEmpty. Operand 2050 states and 3077 transitions. [2022-03-20 21:15:23,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-03-20 21:15:23,803 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:15:23,803 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:15:23,820 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-03-20 21:15:24,004 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-03-20 21:15:24,004 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:15:24,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:15:24,004 INFO L85 PathProgramCache]: Analyzing trace with hash 2097211745, now seen corresponding path program 47 times [2022-03-20 21:15:24,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:15:24,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1656235676] [2022-03-20 21:15:24,005 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:15:24,005 INFO L85 PathProgramCache]: Analyzing trace with hash 2097211745, now seen corresponding path program 48 times [2022-03-20 21:15:24,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:15:24,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718170008] [2022-03-20 21:15:24,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:15:24,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:15:24,011 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:15:24,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [405045404] [2022-03-20 21:15:24,012 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 21:15:24,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:15:24,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:15:24,015 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 21:15:24,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-20 21:15:24,090 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 21:15:24,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:15:24,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 86 conjunts are in the unsatisfiable core [2022-03-20 21:15:24,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:15:25,340 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 127 proven. 128 refuted. 0 times theorem prover too weak. 649 trivial. 0 not checked. [2022-03-20 21:15:25,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:15:25,941 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:15:28,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:15:28,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718170008] [2022-03-20 21:15:28,605 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:15:28,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405045404] [2022-03-20 21:15:28,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405045404] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 21:15:28,605 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 21:15:28,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-03-20 21:15:28,605 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:15:28,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1656235676] [2022-03-20 21:15:28,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1656235676] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:15:28,605 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:15:28,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-20 21:15:28,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639055586] [2022-03-20 21:15:28,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:15:28,605 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 21:15:28,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:15:28,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 21:15:28,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=519, Unknown=1, NotChecked=0, Total=600 [2022-03-20 21:15:28,606 INFO L87 Difference]: Start difference. First operand 2050 states and 3077 transitions. Second operand has 18 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 6 states have call predecessors, (18), 5 states have call successors, (18) [2022-03-20 21:15:34,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:15:34,430 INFO L93 Difference]: Finished difference Result 2460 states and 3690 transitions. [2022-03-20 21:15:34,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 21:15:34,431 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 6 states have call predecessors, (18), 5 states have call successors, (18) Word has length 160 [2022-03-20 21:15:34,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:15:34,439 INFO L225 Difference]: With dead ends: 2460 [2022-03-20 21:15:34,439 INFO L226 Difference]: Without dead ends: 2457 [2022-03-20 21:15:34,440 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 169 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=160, Invalid=1028, Unknown=2, NotChecked=0, Total=1190 [2022-03-20 21:15:34,440 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 65 mSDsluCounter, 605 mSDsCounter, 0 mSdLazyCounter, 848 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 665 SdHoareTripleChecker+Invalid, 931 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 848 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-20 21:15:34,440 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 665 Invalid, 931 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 848 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-20 21:15:34,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2457 states. [2022-03-20 21:15:35,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2457 to 2377. [2022-03-20 21:15:35,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2377 states, 1268 states have (on average 1.2192429022082019) internal successors, (1546), 1295 states have internal predecessors, (1546), 1022 states have call successors, (1022), 87 states have call predecessors, (1022), 86 states have return successors, (1020), 994 states have call predecessors, (1020), 1020 states have call successors, (1020) [2022-03-20 21:15:35,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2377 states to 2377 states and 3588 transitions. [2022-03-20 21:15:35,576 INFO L78 Accepts]: Start accepts. Automaton has 2377 states and 3588 transitions. Word has length 160 [2022-03-20 21:15:35,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:15:35,576 INFO L478 AbstractCegarLoop]: Abstraction has 2377 states and 3588 transitions. [2022-03-20 21:15:35,576 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 6 states have call predecessors, (18), 5 states have call successors, (18) [2022-03-20 21:15:35,576 INFO L276 IsEmpty]: Start isEmpty. Operand 2377 states and 3588 transitions. [2022-03-20 21:15:35,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-03-20 21:15:35,578 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:15:35,578 INFO L499 BasicCegarLoop]: trace histogram [23, 22, 22, 6, 6, 6, 6, 6, 6, 5, 5, 5, 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, 1, 1] [2022-03-20 21:15:35,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-03-20 21:15:35,779 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-03-20 21:15:35,779 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:15:35,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:15:35,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1031964217, now seen corresponding path program 1 times [2022-03-20 21:15:35,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:15:35,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2082506854] [2022-03-20 21:15:35,780 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:15:35,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1031964217, now seen corresponding path program 2 times [2022-03-20 21:15:35,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:15:35,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138810603] [2022-03-20 21:15:35,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:15:35,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:15:35,786 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:15:35,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1857884700] [2022-03-20 21:15:35,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 21:15:35,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:15:35,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:15:35,788 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 21:15:35,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-20 21:15:35,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 21:15:35,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:15:35,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-20 21:15:35,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:15:36,517 INFO L134 CoverageAnalysis]: Checked inductivity of 1079 backedges. 224 proven. 72 refuted. 0 times theorem prover too weak. 783 trivial. 0 not checked. [2022-03-20 21:15:36,517 INFO L328 TraceCheckSpWp]: Computing backward predicates...