/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_valuebound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 20:43:47,691 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 20:43:47,693 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 20:43:47,730 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 20:43:47,771 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 20:43:47,772 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 20:43:47,773 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 20:43:47,774 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 20:43:47,783 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 20:43:47,783 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 20:43:47,784 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 20:43:47,784 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 20:43:47,784 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 20:43:47,785 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 20:43:47,785 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 20:43:47,785 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 20:43:47,785 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 20:43:47,786 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 20:43:47,786 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 20:43:47,786 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 20:43:47,786 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 20:43:47,786 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 20:43:47,786 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 20:43:47,786 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 20:43:47,786 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 20:43:47,787 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-20 20:43:47,787 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-20 20:43:47,787 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-20 20:43:47,787 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 20:43:47,787 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-20 20:43:47,787 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 20:43:47,996 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 20:43:48,029 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 20:43:48,031 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 20:43:48,032 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 20:43:48,035 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 20:43:48,036 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_valuebound10.c [2022-03-20 20:43:48,091 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a277fe4c9/4c05a0b9ba8b40559bd32ac546c48c83/FLAGdf2cb77da [2022-03-20 20:43:48,462 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 20:43:48,462 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_valuebound10.c [2022-03-20 20:43:48,467 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a277fe4c9/4c05a0b9ba8b40559bd32ac546c48c83/FLAGdf2cb77da [2022-03-20 20:43:48,477 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a277fe4c9/4c05a0b9ba8b40559bd32ac546c48c83 [2022-03-20 20:43:48,479 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 20:43:48,480 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 20:43:48,481 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 20:43:48,482 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 20:43:48,499 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 20:43:48,500 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 08:43:48" (1/1) ... [2022-03-20 20:43:48,501 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@700f198a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:43:48, skipping insertion in model container [2022-03-20 20:43:48,501 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 08:43:48" (1/1) ... [2022-03-20 20:43:48,510 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 20:43:48,520 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 20:43:48,631 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_valuebound10.c[489,502] [2022-03-20 20:43:48,648 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 20:43:48,654 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 20:43:48,662 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_valuebound10.c[489,502] [2022-03-20 20:43:48,672 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 20:43:48,681 INFO L208 MainTranslator]: Completed translation [2022-03-20 20:43:48,682 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:43:48 WrapperNode [2022-03-20 20:43:48,682 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 20:43:48,682 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 20:43:48,683 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 20:43:48,683 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 20:43:48,690 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:43:48" (1/1) ... [2022-03-20 20:43:48,691 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:43:48" (1/1) ... [2022-03-20 20:43:48,696 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:43:48" (1/1) ... [2022-03-20 20:43:48,696 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:43:48" (1/1) ... [2022-03-20 20:43:48,700 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:43:48" (1/1) ... [2022-03-20 20:43:48,703 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:43:48" (1/1) ... [2022-03-20 20:43:48,704 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:43:48" (1/1) ... [2022-03-20 20:43:48,705 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 20:43:48,706 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 20:43:48,706 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 20:43:48,706 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 20:43:48,707 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:43:48" (1/1) ... [2022-03-20 20:43:48,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 20:43:48,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:43:48,735 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 20:43:48,742 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 20:43:48,793 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 20:43:48,795 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 20:43:48,795 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 20:43:48,795 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 20:43:48,795 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 20:43:48,796 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 20:43:48,796 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 20:43:48,796 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 20:43:48,796 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 20:43:48,796 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 20:43:48,796 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 20:43:48,796 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 20:43:48,796 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 20:43:48,796 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 20:43:48,796 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 20:43:48,796 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 20:43:48,796 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 20:43:48,797 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 20:43:48,797 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 20:43:48,797 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 20:43:48,840 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 20:43:48,842 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 20:43:48,946 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 20:43:48,951 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 20:43:48,951 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-20 20:43:48,953 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 08:43:48 BoogieIcfgContainer [2022-03-20 20:43:48,953 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 20:43:48,954 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 20:43:48,954 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 20:43:48,958 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 20:43:48,958 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 08:43:48" (1/3) ... [2022-03-20 20:43:48,958 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5df19f5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 08:43:48, skipping insertion in model container [2022-03-20 20:43:48,959 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:43:48" (2/3) ... [2022-03-20 20:43:48,959 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5df19f5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 08:43:48, skipping insertion in model container [2022-03-20 20:43:48,959 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 08:43:48" (3/3) ... [2022-03-20 20:43:48,960 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd-ll_valuebound10.c [2022-03-20 20:43:48,964 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-20 20:43:48,964 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 20:43:48,997 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 20:43:49,004 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 20:43:49,004 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 20:43:49,020 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-20 20:43:49,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-20 20:43:49,037 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:43:49,037 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 20:43:49,038 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:43:49,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:43:49,043 INFO L85 PathProgramCache]: Analyzing trace with hash 870870740, now seen corresponding path program 1 times [2022-03-20 20:43:49,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:43:49,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [400558852] [2022-03-20 20:43:49,058 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:43:49,058 INFO L85 PathProgramCache]: Analyzing trace with hash 870870740, now seen corresponding path program 2 times [2022-03-20 20:43:49,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:43:49,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400950325] [2022-03-20 20:43:49,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:43:49,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:43:49,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 20:43:49,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 20:43:49,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 20:43:49,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 20:43:49,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 20:43:49,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 20:43:49,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 20:43:49,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-20 20:43:49,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 20:43:49,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-20 20:43:49,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 20:43:49,232 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 20:43:49,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:43:49,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400950325] [2022-03-20 20:43:49,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400950325] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:43:49,234 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:43:49,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 20:43:49,236 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:43:49,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [400558852] [2022-03-20 20:43:49,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [400558852] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:43:49,237 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:43:49,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 20:43:49,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689864735] [2022-03-20 20:43:49,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:43:49,241 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 20:43:49,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:43:49,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 20:43:49,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 20:43:49,262 INFO L87 Difference]: Start difference. First operand has 37 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 20:43:49,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:43:49,337 INFO L93 Difference]: Finished difference Result 67 states and 105 transitions. [2022-03-20 20:43:49,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 20:43:49,340 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 20:43:49,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:43:49,345 INFO L225 Difference]: With dead ends: 67 [2022-03-20 20:43:49,345 INFO L226 Difference]: Without dead ends: 32 [2022-03-20 20:43:49,348 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 20:43:49,351 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 18 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 20:43:49,352 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 39 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 20:43:49,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-03-20 20:43:49,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-03-20 20:43:49,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-20 20:43:49,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2022-03-20 20:43:49,385 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 33 [2022-03-20 20:43:49,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:43:49,385 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2022-03-20 20:43:49,386 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 20:43:49,386 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2022-03-20 20:43:49,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-20 20:43:49,387 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:43:49,387 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 20:43:49,388 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 20:43:49,388 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:43:49,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:43:49,389 INFO L85 PathProgramCache]: Analyzing trace with hash -1006914976, now seen corresponding path program 1 times [2022-03-20 20:43:49,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:43:49,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1934628375] [2022-03-20 20:43:49,390 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:43:49,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1006914976, now seen corresponding path program 2 times [2022-03-20 20:43:49,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:43:49,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38814408] [2022-03-20 20:43:49,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:43:49,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:43:49,408 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:43:49,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1463835848] [2022-03-20 20:43:49,408 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:43:49,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:43:49,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:43:49,410 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 20:43:49,419 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 20:43:49,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-20 20:43:49,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:43:49,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 20:43:49,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:43:49,569 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 20:43:49,570 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 20:43:49,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:43:49,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38814408] [2022-03-20 20:43:49,570 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:43:49,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463835848] [2022-03-20 20:43:49,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463835848] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:43:49,571 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:43:49,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 20:43:49,572 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:43:49,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1934628375] [2022-03-20 20:43:49,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1934628375] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:43:49,572 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:43:49,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 20:43:49,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099446996] [2022-03-20 20:43:49,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:43:49,573 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 20:43:49,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:43:49,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 20:43:49,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 20:43:49,574 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-20 20:43:49,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:43:49,616 INFO L93 Difference]: Finished difference Result 48 states and 65 transitions. [2022-03-20 20:43:49,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 20:43:49,616 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 33 [2022-03-20 20:43:49,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:43:49,618 INFO L225 Difference]: With dead ends: 48 [2022-03-20 20:43:49,618 INFO L226 Difference]: Without dead ends: 46 [2022-03-20 20:43:49,618 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 20:43:49,619 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 7 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 20:43:49,619 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 155 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 20:43:49,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-03-20 20:43:49,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2022-03-20 20:43:49,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 23 states have internal predecessors, (26), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-20 20:43:49,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 62 transitions. [2022-03-20 20:43:49,630 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 62 transitions. Word has length 33 [2022-03-20 20:43:49,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:43:49,631 INFO L478 AbstractCegarLoop]: Abstraction has 45 states and 62 transitions. [2022-03-20 20:43:49,631 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-20 20:43:49,631 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 62 transitions. [2022-03-20 20:43:49,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-20 20:43:49,632 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:43:49,632 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] [2022-03-20 20:43:49,651 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-20 20:43:49,847 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 20:43:49,847 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:43:49,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:43:49,848 INFO L85 PathProgramCache]: Analyzing trace with hash -124657161, now seen corresponding path program 1 times [2022-03-20 20:43:49,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:43:49,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [744896372] [2022-03-20 20:43:49,859 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:43:49,860 INFO L85 PathProgramCache]: Analyzing trace with hash -124657161, now seen corresponding path program 2 times [2022-03-20 20:43:49,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:43:49,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386728551] [2022-03-20 20:43:49,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:43:49,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:43:49,904 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:43:49,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2019586743] [2022-03-20 20:43:49,905 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:43:49,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:43:49,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:43:49,907 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 20:43:49,908 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 20:43:49,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:43:49,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:43:49,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 20:43:49,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:43:50,075 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 20:43:50,076 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 20:43:50,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:43:50,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386728551] [2022-03-20 20:43:50,077 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:43:50,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019586743] [2022-03-20 20:43:50,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019586743] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:43:50,077 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:43:50,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 20:43:50,078 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:43:50,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [744896372] [2022-03-20 20:43:50,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [744896372] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:43:50,078 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:43:50,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 20:43:50,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373643084] [2022-03-20 20:43:50,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:43:50,079 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 20:43:50,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:43:50,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 20:43:50,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 20:43:50,080 INFO L87 Difference]: Start difference. First operand 45 states and 62 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-20 20:43:50,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:43:50,141 INFO L93 Difference]: Finished difference Result 52 states and 68 transitions. [2022-03-20 20:43:50,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 20:43:50,142 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 38 [2022-03-20 20:43:50,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:43:50,144 INFO L225 Difference]: With dead ends: 52 [2022-03-20 20:43:50,144 INFO L226 Difference]: Without dead ends: 50 [2022-03-20 20:43:50,146 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 20:43:50,149 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 8 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 20:43:50,149 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 156 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 20:43:50,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-03-20 20:43:50,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2022-03-20 20:43:50,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 26 states have internal predecessors, (29), 19 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-20 20:43:50,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 65 transitions. [2022-03-20 20:43:50,163 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 65 transitions. Word has length 38 [2022-03-20 20:43:50,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:43:50,163 INFO L478 AbstractCegarLoop]: Abstraction has 49 states and 65 transitions. [2022-03-20 20:43:50,164 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-20 20:43:50,164 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 65 transitions. [2022-03-20 20:43:50,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-20 20:43:50,164 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:43:50,165 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] [2022-03-20 20:43:50,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 20:43:50,382 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 20:43:50,383 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:43:50,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:43:50,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1732898944, now seen corresponding path program 1 times [2022-03-20 20:43:50,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:43:50,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1244938926] [2022-03-20 20:43:50,384 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:43:50,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1732898944, now seen corresponding path program 2 times [2022-03-20 20:43:50,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:43:50,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133207107] [2022-03-20 20:43:50,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:43:50,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:43:50,408 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:43:50,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [257926806] [2022-03-20 20:43:50,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:43:50,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:43:50,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:43:50,424 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 20:43:50,425 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 20:43:50,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:43:50,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:43:50,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 20:43:50,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:43:50,574 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 20:43:50,574 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 20:43:50,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:43:50,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133207107] [2022-03-20 20:43:50,574 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:43:50,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257926806] [2022-03-20 20:43:50,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257926806] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:43:50,575 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:43:50,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 20:43:50,575 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:43:50,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1244938926] [2022-03-20 20:43:50,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1244938926] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:43:50,576 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:43:50,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 20:43:50,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778845835] [2022-03-20 20:43:50,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:43:50,576 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 20:43:50,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:43:50,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 20:43:50,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 20:43:50,577 INFO L87 Difference]: Start difference. First operand 49 states and 65 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 20:43:50,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:43:50,622 INFO L93 Difference]: Finished difference Result 74 states and 105 transitions. [2022-03-20 20:43:50,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 20:43:50,622 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 43 [2022-03-20 20:43:50,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:43:50,624 INFO L225 Difference]: With dead ends: 74 [2022-03-20 20:43:50,625 INFO L226 Difference]: Without dead ends: 70 [2022-03-20 20:43:50,625 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 20:43:50,626 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 8 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 20:43:50,626 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 155 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 20:43:50,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-03-20 20:43:50,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2022-03-20 20:43:50,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 37 states have internal predecessors, (42), 30 states have call successors, (30), 7 states have call predecessors, (30), 6 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2022-03-20 20:43:50,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 98 transitions. [2022-03-20 20:43:50,636 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 98 transitions. Word has length 43 [2022-03-20 20:43:50,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:43:50,637 INFO L478 AbstractCegarLoop]: Abstraction has 70 states and 98 transitions. [2022-03-20 20:43:50,637 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 20:43:50,637 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 98 transitions. [2022-03-20 20:43:50,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-03-20 20:43:50,638 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:43:50,638 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] [2022-03-20 20:43:50,678 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-03-20 20:43:50,879 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 20:43:50,879 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:43:50,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:43:50,880 INFO L85 PathProgramCache]: Analyzing trace with hash -301191846, now seen corresponding path program 1 times [2022-03-20 20:43:50,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:43:50,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1114970060] [2022-03-20 20:43:50,880 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:43:50,880 INFO L85 PathProgramCache]: Analyzing trace with hash -301191846, now seen corresponding path program 2 times [2022-03-20 20:43:50,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:43:50,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642347367] [2022-03-20 20:43:50,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:43:50,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:43:50,892 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:43:50,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [910825685] [2022-03-20 20:43:50,892 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:43:50,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:43:50,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:43:50,894 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 20:43:50,895 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 20:43:50,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:43:50,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:43:50,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-20 20:43:50,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:43:51,014 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 20:43:51,014 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 20:43:51,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:43:51,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642347367] [2022-03-20 20:43:51,014 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:43:51,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910825685] [2022-03-20 20:43:51,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910825685] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:43:51,015 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:43:51,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 20:43:51,015 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:43:51,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1114970060] [2022-03-20 20:43:51,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1114970060] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:43:51,015 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:43:51,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 20:43:51,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118868138] [2022-03-20 20:43:51,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:43:51,016 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 20:43:51,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:43:51,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 20:43:51,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 20:43:51,016 INFO L87 Difference]: Start difference. First operand 70 states and 98 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2022-03-20 20:43:51,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:43:51,050 INFO L93 Difference]: Finished difference Result 76 states and 103 transitions. [2022-03-20 20:43:51,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 20:43:51,051 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) Word has length 49 [2022-03-20 20:43:51,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:43:51,052 INFO L225 Difference]: With dead ends: 76 [2022-03-20 20:43:51,052 INFO L226 Difference]: Without dead ends: 74 [2022-03-20 20:43:51,052 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 20:43:51,053 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 5 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 20:43:51,053 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 147 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 20:43:51,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-03-20 20:43:51,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2022-03-20 20:43:51,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 36 states have (on average 1.25) internal successors, (45), 40 states have internal predecessors, (45), 30 states have call successors, (30), 8 states have call predecessors, (30), 7 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2022-03-20 20:43:51,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 101 transitions. [2022-03-20 20:43:51,062 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 101 transitions. Word has length 49 [2022-03-20 20:43:51,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:43:51,062 INFO L478 AbstractCegarLoop]: Abstraction has 74 states and 101 transitions. [2022-03-20 20:43:51,062 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2022-03-20 20:43:51,062 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 101 transitions. [2022-03-20 20:43:51,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-20 20:43:51,063 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:43:51,063 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:43:51,083 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 20:43:51,281 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 20:43:51,282 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:43:51,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:43:51,282 INFO L85 PathProgramCache]: Analyzing trace with hash -1164909737, now seen corresponding path program 1 times [2022-03-20 20:43:51,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:43:51,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1562427104] [2022-03-20 20:43:51,283 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:43:51,283 INFO L85 PathProgramCache]: Analyzing trace with hash -1164909737, now seen corresponding path program 2 times [2022-03-20 20:43:51,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:43:51,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524548544] [2022-03-20 20:43:51,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:43:51,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:43:51,294 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:43:51,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1934410707] [2022-03-20 20:43:51,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:43:51,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:43:51,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:43:51,295 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 20:43:51,296 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 20:43:51,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:43:51,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:43:51,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-20 20:43:51,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:43:51,483 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-03-20 20:43:51,484 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 20:43:51,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:43:51,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524548544] [2022-03-20 20:43:51,484 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:43:51,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934410707] [2022-03-20 20:43:51,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934410707] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:43:51,484 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:43:51,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 20:43:51,485 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:43:51,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1562427104] [2022-03-20 20:43:51,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1562427104] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:43:51,485 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:43:51,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 20:43:51,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791860524] [2022-03-20 20:43:51,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:43:51,485 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 20:43:51,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:43:51,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 20:43:51,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 20:43:51,486 INFO L87 Difference]: Start difference. First operand 74 states and 101 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-20 20:43:51,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:43:51,541 INFO L93 Difference]: Finished difference Result 84 states and 109 transitions. [2022-03-20 20:43:51,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 20:43:51,541 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 51 [2022-03-20 20:43:51,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:43:51,542 INFO L225 Difference]: With dead ends: 84 [2022-03-20 20:43:51,542 INFO L226 Difference]: Without dead ends: 81 [2022-03-20 20:43:51,542 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 20:43:51,543 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 6 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 20:43:51,543 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 158 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 20:43:51,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-03-20 20:43:51,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2022-03-20 20:43:51,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 42 states have (on average 1.2142857142857142) internal successors, (51), 45 states have internal predecessors, (51), 27 states have call successors, (27), 10 states have call predecessors, (27), 9 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2022-03-20 20:43:51,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 102 transitions. [2022-03-20 20:43:51,551 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 102 transitions. Word has length 51 [2022-03-20 20:43:51,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:43:51,552 INFO L478 AbstractCegarLoop]: Abstraction has 79 states and 102 transitions. [2022-03-20 20:43:51,552 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-20 20:43:51,552 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 102 transitions. [2022-03-20 20:43:51,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-20 20:43:51,553 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:43:51,553 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:43:51,573 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 20:43:51,773 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 20:43:51,774 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:43:51,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:43:51,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1924168317, now seen corresponding path program 1 times [2022-03-20 20:43:51,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:43:51,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [509514046] [2022-03-20 20:43:51,775 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:43:51,775 INFO L85 PathProgramCache]: Analyzing trace with hash 1924168317, now seen corresponding path program 2 times [2022-03-20 20:43:51,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:43:51,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213061803] [2022-03-20 20:43:51,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:43:51,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:43:51,785 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:43:51,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [952717846] [2022-03-20 20:43:51,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:43:51,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:43:51,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:43:51,787 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 20:43:51,788 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 20:43:51,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:43:51,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:43:51,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-20 20:43:51,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:43:51,937 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-03-20 20:43:51,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:43:52,084 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-03-20 20:43:52,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:43:52,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213061803] [2022-03-20 20:43:52,085 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:43:52,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952717846] [2022-03-20 20:43:52,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952717846] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:43:52,085 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:43:52,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-03-20 20:43:52,085 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:43:52,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [509514046] [2022-03-20 20:43:52,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [509514046] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:43:52,086 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:43:52,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 20:43:52,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975153704] [2022-03-20 20:43:52,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:43:52,086 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 20:43:52,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:43:52,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 20:43:52,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-03-20 20:43:52,087 INFO L87 Difference]: Start difference. First operand 79 states and 102 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-20 20:43:52,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:43:52,182 INFO L93 Difference]: Finished difference Result 88 states and 112 transitions. [2022-03-20 20:43:52,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 20:43:52,183 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 54 [2022-03-20 20:43:52,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:43:52,184 INFO L225 Difference]: With dead ends: 88 [2022-03-20 20:43:52,184 INFO L226 Difference]: Without dead ends: 84 [2022-03-20 20:43:52,184 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-03-20 20:43:52,185 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 14 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 20:43:52,185 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 158 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 20:43:52,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-03-20 20:43:52,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2022-03-20 20:43:52,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 49 states have internal predecessors, (53), 27 states have call successors, (27), 11 states have call predecessors, (27), 10 states have return successors, (25), 23 states have call predecessors, (25), 25 states have call successors, (25) [2022-03-20 20:43:52,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 105 transitions. [2022-03-20 20:43:52,195 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 105 transitions. Word has length 54 [2022-03-20 20:43:52,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:43:52,195 INFO L478 AbstractCegarLoop]: Abstraction has 84 states and 105 transitions. [2022-03-20 20:43:52,195 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-20 20:43:52,195 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 105 transitions. [2022-03-20 20:43:52,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-20 20:43:52,196 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:43:52,196 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:43:52,217 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 20:43:52,413 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 20:43:52,413 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:43:52,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:43:52,414 INFO L85 PathProgramCache]: Analyzing trace with hash 1698149216, now seen corresponding path program 3 times [2022-03-20 20:43:52,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:43:52,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2108096918] [2022-03-20 20:43:52,414 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:43:52,414 INFO L85 PathProgramCache]: Analyzing trace with hash 1698149216, now seen corresponding path program 4 times [2022-03-20 20:43:52,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:43:52,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462870593] [2022-03-20 20:43:52,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:43:52,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:43:52,423 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:43:52,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [934432443] [2022-03-20 20:43:52,423 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 20:43:52,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:43:52,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:43:52,428 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 20:43:52,429 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 20:43:52,466 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 20:43:52,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:43:52,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-20 20:43:52,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:43:52,709 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-03-20 20:43:52,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:43:52,829 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-03-20 20:43:52,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:43:52,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462870593] [2022-03-20 20:43:52,829 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:43:52,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934432443] [2022-03-20 20:43:52,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934432443] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:43:52,829 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:43:52,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 11 [2022-03-20 20:43:52,830 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:43:52,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2108096918] [2022-03-20 20:43:52,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2108096918] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:43:52,830 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:43:52,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 20:43:52,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866582614] [2022-03-20 20:43:52,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:43:52,830 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 20:43:52,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:43:52,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 20:43:52,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-03-20 20:43:52,831 INFO L87 Difference]: Start difference. First operand 84 states and 105 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-20 20:43:52,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:43:52,966 INFO L93 Difference]: Finished difference Result 118 states and 147 transitions. [2022-03-20 20:43:52,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 20:43:52,966 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) Word has length 56 [2022-03-20 20:43:52,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:43:52,968 INFO L225 Difference]: With dead ends: 118 [2022-03-20 20:43:52,968 INFO L226 Difference]: Without dead ends: 116 [2022-03-20 20:43:52,968 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-03-20 20:43:52,969 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 21 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 20:43:52,969 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 224 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 20:43:52,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-03-20 20:43:52,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 112. [2022-03-20 20:43:52,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 64 states have (on average 1.15625) internal successors, (74), 67 states have internal predecessors, (74), 33 states have call successors, (33), 15 states have call predecessors, (33), 14 states have return successors, (31), 29 states have call predecessors, (31), 31 states have call successors, (31) [2022-03-20 20:43:52,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 138 transitions. [2022-03-20 20:43:52,981 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 138 transitions. Word has length 56 [2022-03-20 20:43:52,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:43:52,981 INFO L478 AbstractCegarLoop]: Abstraction has 112 states and 138 transitions. [2022-03-20 20:43:52,982 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-20 20:43:52,982 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 138 transitions. [2022-03-20 20:43:52,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-20 20:43:52,982 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:43:52,982 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:43:53,000 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 20:43:53,195 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 20:43:53,195 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:43:53,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:43:53,196 INFO L85 PathProgramCache]: Analyzing trace with hash 888099957, now seen corresponding path program 1 times [2022-03-20 20:43:53,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:43:53,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [425457446] [2022-03-20 20:43:53,196 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:43:53,197 INFO L85 PathProgramCache]: Analyzing trace with hash 888099957, now seen corresponding path program 2 times [2022-03-20 20:43:53,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:43:53,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226143331] [2022-03-20 20:43:53,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:43:53,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:43:53,205 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:43:53,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [912059500] [2022-03-20 20:43:53,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:43:53,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:43:53,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:43:53,206 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 20:43:53,207 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 20:43:53,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:43:53,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:43:53,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-20 20:43:53,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:43:53,453 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-20 20:43:53,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:43:53,592 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-20 20:43:53,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:43:53,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226143331] [2022-03-20 20:43:53,592 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:43:53,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912059500] [2022-03-20 20:43:53,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912059500] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:43:53,593 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:43:53,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-03-20 20:43:53,593 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:43:53,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [425457446] [2022-03-20 20:43:53,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [425457446] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:43:53,593 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:43:53,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 20:43:53,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932895379] [2022-03-20 20:43:53,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:43:53,594 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 20:43:53,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:43:53,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 20:43:53,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-03-20 20:43:53,594 INFO L87 Difference]: Start difference. First operand 112 states and 138 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-03-20 20:43:53,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:43:53,681 INFO L93 Difference]: Finished difference Result 137 states and 178 transitions. [2022-03-20 20:43:53,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 20:43:53,682 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 61 [2022-03-20 20:43:53,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:43:53,683 INFO L225 Difference]: With dead ends: 137 [2022-03-20 20:43:53,683 INFO L226 Difference]: Without dead ends: 131 [2022-03-20 20:43:53,683 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-03-20 20:43:53,684 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 8 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 20:43:53,684 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 198 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 20:43:53,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-03-20 20:43:53,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2022-03-20 20:43:53,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 73 states have (on average 1.178082191780822) internal successors, (86), 77 states have internal predecessors, (86), 42 states have call successors, (42), 16 states have call predecessors, (42), 15 states have return successors, (39), 37 states have call predecessors, (39), 39 states have call successors, (39) [2022-03-20 20:43:53,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 167 transitions. [2022-03-20 20:43:53,697 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 167 transitions. Word has length 61 [2022-03-20 20:43:53,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:43:53,698 INFO L478 AbstractCegarLoop]: Abstraction has 131 states and 167 transitions. [2022-03-20 20:43:53,698 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-03-20 20:43:53,698 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 167 transitions. [2022-03-20 20:43:53,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-20 20:43:53,699 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:43:53,699 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:43:53,717 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-03-20 20:43:53,917 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 20:43:53,917 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:43:53,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:43:53,918 INFO L85 PathProgramCache]: Analyzing trace with hash 2064127436, now seen corresponding path program 1 times [2022-03-20 20:43:53,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:43:53,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [257795247] [2022-03-20 20:43:53,918 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:43:53,919 INFO L85 PathProgramCache]: Analyzing trace with hash 2064127436, now seen corresponding path program 2 times [2022-03-20 20:43:53,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:43:53,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51255093] [2022-03-20 20:43:53,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:43:53,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:43:53,927 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:43:53,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [130994795] [2022-03-20 20:43:53,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:43:53,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:43:53,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:43:53,929 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 20:43:53,930 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 20:43:53,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:43:53,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:43:53,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-20 20:43:53,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:43:54,199 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-20 20:43:54,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:43:54,325 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-03-20 20:43:54,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:43:54,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51255093] [2022-03-20 20:43:54,326 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:43:54,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130994795] [2022-03-20 20:43:54,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130994795] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 20:43:54,326 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 20:43:54,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 8 [2022-03-20 20:43:54,327 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:43:54,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [257795247] [2022-03-20 20:43:54,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [257795247] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:43:54,327 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:43:54,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 20:43:54,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747752863] [2022-03-20 20:43:54,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:43:54,327 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 20:43:54,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:43:54,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 20:43:54,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-03-20 20:43:54,328 INFO L87 Difference]: Start difference. First operand 131 states and 167 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-20 20:43:54,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:43:54,370 INFO L93 Difference]: Finished difference Result 137 states and 172 transitions. [2022-03-20 20:43:54,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 20:43:54,371 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 69 [2022-03-20 20:43:54,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:43:54,372 INFO L225 Difference]: With dead ends: 137 [2022-03-20 20:43:54,372 INFO L226 Difference]: Without dead ends: 132 [2022-03-20 20:43:54,372 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 128 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-03-20 20:43:54,373 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 6 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 20:43:54,373 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 128 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 20:43:54,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-03-20 20:43:54,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2022-03-20 20:43:54,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 76 states have (on average 1.1578947368421053) internal successors, (88), 79 states have internal predecessors, (88), 39 states have call successors, (39), 17 states have call predecessors, (39), 16 states have return successors, (37), 35 states have call predecessors, (37), 37 states have call successors, (37) [2022-03-20 20:43:54,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 164 transitions. [2022-03-20 20:43:54,386 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 164 transitions. Word has length 69 [2022-03-20 20:43:54,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:43:54,386 INFO L478 AbstractCegarLoop]: Abstraction has 132 states and 164 transitions. [2022-03-20 20:43:54,386 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-20 20:43:54,386 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 164 transitions. [2022-03-20 20:43:54,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-03-20 20:43:54,387 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:43:54,387 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:43:54,431 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-03-20 20:43:54,605 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 20:43:54,605 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:43:54,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:43:54,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1196252297, now seen corresponding path program 5 times [2022-03-20 20:43:54,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:43:54,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [383210970] [2022-03-20 20:43:54,606 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:43:54,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1196252297, now seen corresponding path program 6 times [2022-03-20 20:43:54,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:43:54,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039564834] [2022-03-20 20:43:54,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:43:54,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:43:54,628 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:43:54,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1743685429] [2022-03-20 20:43:54,628 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 20:43:54,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:43:54,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:43:54,634 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 20:43:54,636 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 20:43:54,708 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 20:43:54,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:43:54,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-20 20:43:54,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:43:55,083 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 39 proven. 17 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-03-20 20:43:55,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:43:55,521 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 42 proven. 14 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-03-20 20:43:55,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:43:55,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039564834] [2022-03-20 20:43:55,521 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:43:55,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743685429] [2022-03-20 20:43:55,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743685429] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:43:55,521 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:43:55,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2022-03-20 20:43:55,522 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:43:55,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [383210970] [2022-03-20 20:43:55,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [383210970] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:43:55,522 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:43:55,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 20:43:55,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869859923] [2022-03-20 20:43:55,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:43:55,522 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 20:43:55,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:43:55,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 20:43:55,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-03-20 20:43:55,523 INFO L87 Difference]: Start difference. First operand 132 states and 164 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-03-20 20:43:55,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:43:55,810 INFO L93 Difference]: Finished difference Result 166 states and 206 transitions. [2022-03-20 20:43:55,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 20:43:55,811 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 74 [2022-03-20 20:43:55,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:43:55,812 INFO L225 Difference]: With dead ends: 166 [2022-03-20 20:43:55,812 INFO L226 Difference]: Without dead ends: 164 [2022-03-20 20:43:55,812 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 131 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2022-03-20 20:43:55,813 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 17 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 20:43:55,813 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 305 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 20:43:55,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-03-20 20:43:55,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 150. [2022-03-20 20:43:55,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 88 states have (on average 1.1477272727272727) internal successors, (101), 91 states have internal predecessors, (101), 42 states have call successors, (42), 20 states have call predecessors, (42), 19 states have return successors, (40), 38 states have call predecessors, (40), 40 states have call successors, (40) [2022-03-20 20:43:55,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 183 transitions. [2022-03-20 20:43:55,829 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 183 transitions. Word has length 74 [2022-03-20 20:43:55,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:43:55,842 INFO L478 AbstractCegarLoop]: Abstraction has 150 states and 183 transitions. [2022-03-20 20:43:55,842 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-03-20 20:43:55,843 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 183 transitions. [2022-03-20 20:43:55,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-03-20 20:43:55,843 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:43:55,843 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:43:55,864 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 20:43:56,044 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 20:43:56,044 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:43:56,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:43:56,045 INFO L85 PathProgramCache]: Analyzing trace with hash -1712511605, now seen corresponding path program 3 times [2022-03-20 20:43:56,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:43:56,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [209622967] [2022-03-20 20:43:56,045 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:43:56,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1712511605, now seen corresponding path program 4 times [2022-03-20 20:43:56,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:43:56,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297775216] [2022-03-20 20:43:56,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:43:56,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:43:56,057 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:43:56,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1365863682] [2022-03-20 20:43:56,057 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 20:43:56,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:43:56,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:43:56,061 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 20:43:56,064 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 20:43:56,099 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 20:43:56,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:43:56,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 40 conjunts are in the unsatisfiable core [2022-03-20 20:43:56,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:43:56,592 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 34 proven. 19 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-03-20 20:43:56,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:43:57,013 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 34 proven. 10 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-03-20 20:43:57,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:43:57,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297775216] [2022-03-20 20:43:57,013 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:43:57,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365863682] [2022-03-20 20:43:57,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365863682] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:43:57,014 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:43:57,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 19 [2022-03-20 20:43:57,014 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:43:57,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [209622967] [2022-03-20 20:43:57,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [209622967] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:43:57,014 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:43:57,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 20:43:57,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236734093] [2022-03-20 20:43:57,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:43:57,014 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 20:43:57,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:43:57,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 20:43:57,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2022-03-20 20:43:57,015 INFO L87 Difference]: Start difference. First operand 150 states and 183 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-03-20 20:43:57,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:43:57,435 INFO L93 Difference]: Finished difference Result 188 states and 228 transitions. [2022-03-20 20:43:57,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 20:43:57,435 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 74 [2022-03-20 20:43:57,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:43:57,437 INFO L225 Difference]: With dead ends: 188 [2022-03-20 20:43:57,437 INFO L226 Difference]: Without dead ends: 186 [2022-03-20 20:43:57,437 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 128 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2022-03-20 20:43:57,438 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 24 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 454 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 20:43:57,438 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 347 Invalid, 470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 454 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 20:43:57,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-03-20 20:43:57,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 172. [2022-03-20 20:43:57,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 103 states have (on average 1.1359223300970873) internal successors, (117), 106 states have internal predecessors, (117), 45 states have call successors, (45), 24 states have call predecessors, (45), 23 states have return successors, (43), 41 states have call predecessors, (43), 43 states have call successors, (43) [2022-03-20 20:43:57,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 205 transitions. [2022-03-20 20:43:57,464 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 205 transitions. Word has length 74 [2022-03-20 20:43:57,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:43:57,465 INFO L478 AbstractCegarLoop]: Abstraction has 172 states and 205 transitions. [2022-03-20 20:43:57,465 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-03-20 20:43:57,465 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 205 transitions. [2022-03-20 20:43:57,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-03-20 20:43:57,465 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:43:57,465 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:43:57,483 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 20:43:57,683 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 20:43:57,684 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:43:57,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:43:57,684 INFO L85 PathProgramCache]: Analyzing trace with hash 15858924, now seen corresponding path program 5 times [2022-03-20 20:43:57,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:43:57,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1791406171] [2022-03-20 20:43:57,685 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:43:57,685 INFO L85 PathProgramCache]: Analyzing trace with hash 15858924, now seen corresponding path program 6 times [2022-03-20 20:43:57,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:43:57,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491871507] [2022-03-20 20:43:57,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:43:57,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:43:57,695 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:43:57,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2060327732] [2022-03-20 20:43:57,696 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 20:43:57,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:43:57,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:43:57,707 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 20:43:57,708 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 20:43:57,765 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 20:43:57,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:43:57,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-20 20:43:57,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:43:57,975 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2022-03-20 20:43:57,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:43:58,168 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 27 proven. 14 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2022-03-20 20:43:58,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:43:58,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491871507] [2022-03-20 20:43:58,169 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:43:58,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060327732] [2022-03-20 20:43:58,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060327732] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:43:58,169 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:43:58,169 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2022-03-20 20:43:58,169 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:43:58,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1791406171] [2022-03-20 20:43:58,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1791406171] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:43:58,170 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:43:58,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 20:43:58,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038252031] [2022-03-20 20:43:58,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:43:58,170 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 20:43:58,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:43:58,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 20:43:58,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-03-20 20:43:58,171 INFO L87 Difference]: Start difference. First operand 172 states and 205 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-03-20 20:43:58,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:43:58,354 INFO L93 Difference]: Finished difference Result 186 states and 224 transitions. [2022-03-20 20:43:58,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 20:43:58,354 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 79 [2022-03-20 20:43:58,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:43:58,355 INFO L225 Difference]: With dead ends: 186 [2022-03-20 20:43:58,355 INFO L226 Difference]: Without dead ends: 173 [2022-03-20 20:43:58,356 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 145 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-03-20 20:43:58,356 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 15 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 20:43:58,356 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 158 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 20:43:58,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-03-20 20:43:58,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 153. [2022-03-20 20:43:58,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 94 states have (on average 1.0851063829787233) internal successors, (102), 98 states have internal predecessors, (102), 36 states have call successors, (36), 23 states have call predecessors, (36), 22 states have return successors, (35), 31 states have call predecessors, (35), 35 states have call successors, (35) [2022-03-20 20:43:58,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 173 transitions. [2022-03-20 20:43:58,370 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 173 transitions. Word has length 79 [2022-03-20 20:43:58,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:43:58,371 INFO L478 AbstractCegarLoop]: Abstraction has 153 states and 173 transitions. [2022-03-20 20:43:58,371 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-03-20 20:43:58,371 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 173 transitions. [2022-03-20 20:43:58,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-03-20 20:43:58,371 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:43:58,372 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:43:58,390 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 20:43:58,589 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 20:43:58,590 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:43:58,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:43:58,590 INFO L85 PathProgramCache]: Analyzing trace with hash 2066842922, now seen corresponding path program 3 times [2022-03-20 20:43:58,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:43:58,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1067827874] [2022-03-20 20:43:58,591 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:43:58,591 INFO L85 PathProgramCache]: Analyzing trace with hash 2066842922, now seen corresponding path program 4 times [2022-03-20 20:43:58,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:43:58,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332101414] [2022-03-20 20:43:58,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:43:58,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:43:58,597 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:43:58,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1077877889] [2022-03-20 20:43:58,597 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 20:43:58,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:43:58,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:43:58,599 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 20:43:58,649 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 20:43:58,662 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 20:43:58,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:43:58,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-20 20:43:58,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:43:59,081 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 38 proven. 37 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-03-20 20:43:59,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:43:59,379 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 40 proven. 26 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-03-20 20:43:59,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:43:59,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332101414] [2022-03-20 20:43:59,379 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:43:59,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077877889] [2022-03-20 20:43:59,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077877889] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:43:59,379 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:43:59,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 18 [2022-03-20 20:43:59,380 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:43:59,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1067827874] [2022-03-20 20:43:59,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1067827874] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:43:59,380 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:43:59,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 20:43:59,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160427554] [2022-03-20 20:43:59,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:43:59,380 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 20:43:59,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:43:59,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 20:43:59,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2022-03-20 20:43:59,381 INFO L87 Difference]: Start difference. First operand 153 states and 173 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-20 20:43:59,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:43:59,595 INFO L93 Difference]: Finished difference Result 175 states and 201 transitions. [2022-03-20 20:43:59,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 20:43:59,596 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) Word has length 79 [2022-03-20 20:43:59,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:43:59,597 INFO L225 Difference]: With dead ends: 175 [2022-03-20 20:43:59,597 INFO L226 Difference]: Without dead ends: 173 [2022-03-20 20:43:59,597 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 139 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-03-20 20:43:59,598 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 24 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 20:43:59,598 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 182 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 20:43:59,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-03-20 20:43:59,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 163. [2022-03-20 20:43:59,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 100 states have (on average 1.09) internal successors, (109), 104 states have internal predecessors, (109), 39 states have call successors, (39), 24 states have call predecessors, (39), 23 states have return successors, (38), 34 states have call predecessors, (38), 38 states have call successors, (38) [2022-03-20 20:43:59,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 186 transitions. [2022-03-20 20:43:59,613 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 186 transitions. Word has length 79 [2022-03-20 20:43:59,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:43:59,613 INFO L478 AbstractCegarLoop]: Abstraction has 163 states and 186 transitions. [2022-03-20 20:43:59,613 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-20 20:43:59,613 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 186 transitions. [2022-03-20 20:43:59,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-03-20 20:43:59,614 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:43:59,614 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:43:59,632 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-20 20:43:59,832 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-20 20:43:59,832 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:43:59,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:43:59,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1804875380, now seen corresponding path program 7 times [2022-03-20 20:43:59,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:43:59,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [146984167] [2022-03-20 20:43:59,833 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:43:59,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1804875380, now seen corresponding path program 8 times [2022-03-20 20:43:59,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:43:59,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803587224] [2022-03-20 20:43:59,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:43:59,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:43:59,840 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:43:59,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1050558660] [2022-03-20 20:43:59,841 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:43:59,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:43:59,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:43:59,845 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 20:43:59,846 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 20:43:59,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:43:59,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:43:59,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-20 20:43:59,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:44:04,494 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 66 proven. 38 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-03-20 20:44:04,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:44:04,864 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 75 proven. 8 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2022-03-20 20:44:04,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:44:04,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803587224] [2022-03-20 20:44:04,865 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:44:04,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050558660] [2022-03-20 20:44:04,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050558660] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:44:04,865 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:44:04,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9] total 19 [2022-03-20 20:44:04,865 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:44:04,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [146984167] [2022-03-20 20:44:04,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [146984167] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:44:04,865 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:44:04,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 20:44:04,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300595974] [2022-03-20 20:44:04,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:44:04,868 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 20:44:04,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:44:04,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 20:44:04,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-03-20 20:44:04,868 INFO L87 Difference]: Start difference. First operand 163 states and 186 transitions. Second operand has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 8 states have call predecessors, (15), 7 states have call successors, (15) [2022-03-20 20:44:06,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:44:06,627 INFO L93 Difference]: Finished difference Result 193 states and 224 transitions. [2022-03-20 20:44:06,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 20:44:06,633 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 8 states have call predecessors, (15), 7 states have call successors, (15) Word has length 92 [2022-03-20 20:44:06,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:44:06,634 INFO L225 Difference]: With dead ends: 193 [2022-03-20 20:44:06,634 INFO L226 Difference]: Without dead ends: 191 [2022-03-20 20:44:06,634 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 165 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2022-03-20 20:44:06,635 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 24 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-20 20:44:06,635 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 321 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 432 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-03-20 20:44:06,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-03-20 20:44:06,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2022-03-20 20:44:06,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 116 states have (on average 1.0948275862068966) internal successors, (127), 121 states have internal predecessors, (127), 48 states have call successors, (48), 27 states have call predecessors, (48), 26 states have return successors, (47), 42 states have call predecessors, (47), 47 states have call successors, (47) [2022-03-20 20:44:06,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 222 transitions. [2022-03-20 20:44:06,672 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 222 transitions. Word has length 92 [2022-03-20 20:44:06,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:44:06,673 INFO L478 AbstractCegarLoop]: Abstraction has 191 states and 222 transitions. [2022-03-20 20:44:06,673 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 8 states have call predecessors, (15), 7 states have call successors, (15) [2022-03-20 20:44:06,673 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 222 transitions. [2022-03-20 20:44:06,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-03-20 20:44:06,674 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:44:06,674 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:44:06,692 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 20:44:06,887 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 20:44:06,888 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:44:06,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:44:06,888 INFO L85 PathProgramCache]: Analyzing trace with hash 65583604, now seen corresponding path program 9 times [2022-03-20 20:44:06,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:44:06,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1752082803] [2022-03-20 20:44:06,888 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:44:06,889 INFO L85 PathProgramCache]: Analyzing trace with hash 65583604, now seen corresponding path program 10 times [2022-03-20 20:44:06,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:44:06,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274007357] [2022-03-20 20:44:06,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:44:06,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:44:06,895 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:44:06,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1342218068] [2022-03-20 20:44:06,895 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 20:44:06,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:44:06,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:44:06,897 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 20:44:06,898 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 20:44:06,937 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 20:44:06,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:44:06,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 46 conjunts are in the unsatisfiable core [2022-03-20 20:44:06,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:44:07,438 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 56 proven. 54 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2022-03-20 20:44:07,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:44:07,689 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 75 proven. 8 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2022-03-20 20:44:07,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:44:07,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274007357] [2022-03-20 20:44:07,689 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:44:07,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342218068] [2022-03-20 20:44:07,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342218068] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:44:07,689 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:44:07,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2022-03-20 20:44:07,690 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:44:07,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1752082803] [2022-03-20 20:44:07,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1752082803] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:44:07,690 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:44:07,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 20:44:07,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044534085] [2022-03-20 20:44:07,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:44:07,690 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 20:44:07,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:44:07,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 20:44:07,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-03-20 20:44:07,691 INFO L87 Difference]: Start difference. First operand 191 states and 222 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2022-03-20 20:44:08,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:44:08,036 INFO L93 Difference]: Finished difference Result 220 states and 258 transitions. [2022-03-20 20:44:08,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 20:44:08,037 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) Word has length 92 [2022-03-20 20:44:08,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:44:08,039 INFO L225 Difference]: With dead ends: 220 [2022-03-20 20:44:08,039 INFO L226 Difference]: Without dead ends: 218 [2022-03-20 20:44:08,039 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 168 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2022-03-20 20:44:08,040 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 12 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 20:44:08,041 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 290 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 20:44:08,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-03-20 20:44:08,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 218. [2022-03-20 20:44:08,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 133 states have (on average 1.105263157894737) internal successors, (147), 137 states have internal predecessors, (147), 55 states have call successors, (55), 30 states have call predecessors, (55), 29 states have return successors, (54), 50 states have call predecessors, (54), 54 states have call successors, (54) [2022-03-20 20:44:08,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 256 transitions. [2022-03-20 20:44:08,083 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 256 transitions. Word has length 92 [2022-03-20 20:44:08,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:44:08,083 INFO L478 AbstractCegarLoop]: Abstraction has 218 states and 256 transitions. [2022-03-20 20:44:08,084 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2022-03-20 20:44:08,084 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 256 transitions. [2022-03-20 20:44:08,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-03-20 20:44:08,087 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:44:08,087 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:44:08,105 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 20:44:08,294 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 20:44:08,294 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:44:08,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:44:08,295 INFO L85 PathProgramCache]: Analyzing trace with hash 1451786998, now seen corresponding path program 11 times [2022-03-20 20:44:08,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:44:08,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [489542478] [2022-03-20 20:44:08,295 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:44:08,295 INFO L85 PathProgramCache]: Analyzing trace with hash 1451786998, now seen corresponding path program 12 times [2022-03-20 20:44:08,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:44:08,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220985783] [2022-03-20 20:44:08,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:44:08,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:44:08,302 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:44:08,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1842570307] [2022-03-20 20:44:08,302 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 20:44:08,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:44:08,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:44:08,321 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 20:44:08,323 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 20:44:08,399 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 20:44:08,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:44:08,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-20 20:44:08,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:44:08,650 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 20:44:08,652 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 20:44:13,033 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 70 proven. 11 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2022-03-20 20:44:13,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:44:15,296 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 20:45:28,086 WARN L855 $PredicateComparison]: unable to prove that (forall ((v_main_~r~0_BEFORE_CALL_123 Int) (v_main_~q~0_BEFORE_CALL_121 Int) (v_main_~s~0_BEFORE_CALL_112 Int) (v_main_~p~0_BEFORE_CALL_126 Int)) (or (and (not (= |c___VERIFIER_assert_#in~cond| 0)) (let ((.cse0 (+ (* v_main_~r~0_BEFORE_CALL_123 v_main_~q~0_BEFORE_CALL_121) 1))) (or (not (= |c___VERIFIER_assert_#in~cond| 1)) (= .cse0 0) (= (mod .cse0 v_main_~p~0_BEFORE_CALL_126) 0)))) (not (= (* (+ v_main_~p~0_BEFORE_CALL_126 (* (- 1) v_main_~q~0_BEFORE_CALL_121)) v_main_~s~0_BEFORE_CALL_112) (+ (* (+ (* (- 1) v_main_~s~0_BEFORE_CALL_112) v_main_~r~0_BEFORE_CALL_123) v_main_~q~0_BEFORE_CALL_121) 1))))) is different from true [2022-03-20 20:46:34,118 WARN L855 $PredicateComparison]: unable to prove that (or (= c___VERIFIER_assert_~cond 0) (forall ((v_main_~r~0_BEFORE_CALL_123 Int) (v_main_~q~0_BEFORE_CALL_121 Int) (v_main_~s~0_BEFORE_CALL_112 Int) (v_main_~p~0_BEFORE_CALL_126 Int)) (or (and (not (= |c___VERIFIER_assert_#in~cond| 0)) (let ((.cse0 (+ (* v_main_~r~0_BEFORE_CALL_123 v_main_~q~0_BEFORE_CALL_121) 1))) (or (not (= |c___VERIFIER_assert_#in~cond| 1)) (= .cse0 0) (= (mod .cse0 v_main_~p~0_BEFORE_CALL_126) 0)))) (not (= (* (+ v_main_~p~0_BEFORE_CALL_126 (* (- 1) v_main_~q~0_BEFORE_CALL_121)) v_main_~s~0_BEFORE_CALL_112) (+ (* (+ (* (- 1) v_main_~s~0_BEFORE_CALL_112) v_main_~r~0_BEFORE_CALL_123) v_main_~q~0_BEFORE_CALL_121) 1)))))) is different from true [2022-03-20 20:46:52,163 WARN L855 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 1)) (forall ((v_main_~r~0_BEFORE_CALL_123 Int) (v_main_~q~0_BEFORE_CALL_121 Int) (v_main_~s~0_BEFORE_CALL_112 Int) (v_main_~p~0_BEFORE_CALL_126 Int)) (let ((.cse0 (+ (* v_main_~r~0_BEFORE_CALL_123 v_main_~q~0_BEFORE_CALL_121) 1))) (or (= .cse0 0) (not (= (* (+ v_main_~p~0_BEFORE_CALL_126 (* (- 1) v_main_~q~0_BEFORE_CALL_121)) v_main_~s~0_BEFORE_CALL_112) (+ (* (+ (* (- 1) v_main_~s~0_BEFORE_CALL_112) v_main_~r~0_BEFORE_CALL_123) v_main_~q~0_BEFORE_CALL_121) 1))) (= (mod .cse0 v_main_~p~0_BEFORE_CALL_126) 0))))) is different from true [2022-03-20 20:47:01,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:47:01,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220985783] [2022-03-20 20:47:01,413 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:47:01,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842570307] [2022-03-20 20:47:01,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842570307] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 20:47:01,413 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 20:47:01,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-03-20 20:47:01,413 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:47:01,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [489542478] [2022-03-20 20:47:01,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [489542478] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:47:01,414 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:47:01,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 20:47:01,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022814897] [2022-03-20 20:47:01,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:47:01,414 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 20:47:01,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:47:01,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 20:47:01,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=188, Unknown=9, NotChecked=90, Total=342 [2022-03-20 20:47:01,415 INFO L87 Difference]: Start difference. First operand 218 states and 256 transitions. Second operand has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2022-03-20 20:47:02,907 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 20:47:26,793 WARN L232 SmtUtils]: Spent 23.81s on a formula simplification. DAG size of input: 47 DAG size of output: 44 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 20:47:29,540 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 20:47:29,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:47:29,571 INFO L93 Difference]: Finished difference Result 250 states and 297 transitions. [2022-03-20 20:47:29,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 20:47:29,572 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) Word has length 92 [2022-03-20 20:47:29,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:47:29,573 INFO L225 Difference]: With dead ends: 250 [2022-03-20 20:47:29,573 INFO L226 Difference]: Without dead ends: 248 [2022-03-20 20:47:29,573 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 48.8s TimeCoverageRelationStatistics Valid=76, Invalid=269, Unknown=9, NotChecked=108, Total=462 [2022-03-20 20:47:29,574 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 16 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 10 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-03-20 20:47:29,574 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 227 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 191 Invalid, 1 Unknown, 0 Unchecked, 4.2s Time] [2022-03-20 20:47:29,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-03-20 20:47:29,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 222. [2022-03-20 20:47:29,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 135 states have (on average 1.0962962962962963) internal successors, (148), 141 states have internal predecessors, (148), 56 states have call successors, (56), 31 states have call predecessors, (56), 30 states have return successors, (55), 49 states have call predecessors, (55), 55 states have call successors, (55) [2022-03-20 20:47:29,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 259 transitions. [2022-03-20 20:47:29,605 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 259 transitions. Word has length 92 [2022-03-20 20:47:29,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:47:29,608 INFO L478 AbstractCegarLoop]: Abstraction has 222 states and 259 transitions. [2022-03-20 20:47:29,608 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2022-03-20 20:47:29,608 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 259 transitions. [2022-03-20 20:47:29,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-03-20 20:47:29,609 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:47:29,609 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:47:29,627 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 20:47:29,826 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 20:47:29,827 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:47:29,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:47:29,827 INFO L85 PathProgramCache]: Analyzing trace with hash 1963826657, now seen corresponding path program 13 times [2022-03-20 20:47:29,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:47:29,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [900742897] [2022-03-20 20:47:29,827 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:47:29,827 INFO L85 PathProgramCache]: Analyzing trace with hash 1963826657, now seen corresponding path program 14 times [2022-03-20 20:47:29,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:47:29,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146797007] [2022-03-20 20:47:29,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:47:29,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:47:29,834 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:47:29,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [865122528] [2022-03-20 20:47:29,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:47:29,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:47:29,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:47:29,835 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 20:47:29,836 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 20:47:29,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:47:29,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:47:29,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 42 conjunts are in the unsatisfiable core [2022-03-20 20:47:29,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:47:30,360 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 45 proven. 37 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2022-03-20 20:47:30,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:47:30,710 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 55 proven. 27 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2022-03-20 20:47:30,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:47:30,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146797007] [2022-03-20 20:47:30,711 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:47:30,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865122528] [2022-03-20 20:47:30,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865122528] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:47:30,711 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:47:30,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2022-03-20 20:47:30,711 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:47:30,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [900742897] [2022-03-20 20:47:30,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [900742897] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:47:30,711 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:47:30,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 20:47:30,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094476229] [2022-03-20 20:47:30,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:47:30,712 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 20:47:30,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:47:30,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 20:47:30,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-03-20 20:47:30,712 INFO L87 Difference]: Start difference. First operand 222 states and 259 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2022-03-20 20:47:31,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:47:31,115 INFO L93 Difference]: Finished difference Result 252 states and 293 transitions. [2022-03-20 20:47:31,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 20:47:31,137 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) Word has length 97 [2022-03-20 20:47:31,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:47:31,140 INFO L225 Difference]: With dead ends: 252 [2022-03-20 20:47:31,141 INFO L226 Difference]: Without dead ends: 250 [2022-03-20 20:47:31,142 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 177 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2022-03-20 20:47:31,142 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 14 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 20:47:31,142 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 254 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 20:47:31,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-03-20 20:47:31,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 250. [2022-03-20 20:47:31,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 153 states have (on average 1.0980392156862746) internal successors, (168), 159 states have internal predecessors, (168), 62 states have call successors, (62), 35 states have call predecessors, (62), 34 states have return successors, (61), 55 states have call predecessors, (61), 61 states have call successors, (61) [2022-03-20 20:47:31,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 291 transitions. [2022-03-20 20:47:31,182 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 291 transitions. Word has length 97 [2022-03-20 20:47:31,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:47:31,182 INFO L478 AbstractCegarLoop]: Abstraction has 250 states and 291 transitions. [2022-03-20 20:47:31,183 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2022-03-20 20:47:31,183 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 291 transitions. [2022-03-20 20:47:31,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-03-20 20:47:31,184 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:47:31,184 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:47:31,202 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 20:47:31,402 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 20:47:31,402 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:47:31,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:47:31,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1451182689, now seen corresponding path program 15 times [2022-03-20 20:47:31,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:47:31,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1215359050] [2022-03-20 20:47:31,403 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:47:31,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1451182689, now seen corresponding path program 16 times [2022-03-20 20:47:31,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:47:31,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706607072] [2022-03-20 20:47:31,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:47:31,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:47:31,409 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:47:31,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [557320509] [2022-03-20 20:47:31,409 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 20:47:31,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:47:31,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:47:31,412 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 20:47:31,413 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 20:47:31,455 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 20:47:31,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:47:31,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 57 conjunts are in the unsatisfiable core [2022-03-20 20:47:31,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:47:33,440 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 76 proven. 57 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2022-03-20 20:47:33,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:47:33,829 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 87 proven. 5 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-03-20 20:47:33,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:47:33,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706607072] [2022-03-20 20:47:33,829 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:47:33,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557320509] [2022-03-20 20:47:33,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557320509] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:47:33,829 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:47:33,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10] total 22 [2022-03-20 20:47:33,830 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:47:33,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1215359050] [2022-03-20 20:47:33,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1215359050] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:47:33,830 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:47:33,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-20 20:47:33,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017088271] [2022-03-20 20:47:33,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:47:33,831 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 20:47:33,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:47:33,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 20:47:33,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2022-03-20 20:47:33,831 INFO L87 Difference]: Start difference. First operand 250 states and 291 transitions. Second operand has 17 states, 16 states have (on average 1.875) internal successors, (30), 13 states have internal predecessors, (30), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 6 states have call successors, (16) [2022-03-20 20:47:34,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:47:34,891 INFO L93 Difference]: Finished difference Result 280 states and 325 transitions. [2022-03-20 20:47:34,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 20:47:34,892 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.875) internal successors, (30), 13 states have internal predecessors, (30), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 6 states have call successors, (16) Word has length 97 [2022-03-20 20:47:34,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:47:34,893 INFO L225 Difference]: With dead ends: 280 [2022-03-20 20:47:34,893 INFO L226 Difference]: Without dead ends: 278 [2022-03-20 20:47:34,894 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 172 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2022-03-20 20:47:34,894 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 26 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-20 20:47:34,894 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 276 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 511 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-20 20:47:34,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-03-20 20:47:34,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 261. [2022-03-20 20:47:34,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 160 states have (on average 1.09375) internal successors, (175), 167 states have internal predecessors, (175), 64 states have call successors, (64), 37 states have call predecessors, (64), 36 states have return successors, (63), 56 states have call predecessors, (63), 63 states have call successors, (63) [2022-03-20 20:47:34,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 302 transitions. [2022-03-20 20:47:34,936 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 302 transitions. Word has length 97 [2022-03-20 20:47:34,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:47:34,936 INFO L478 AbstractCegarLoop]: Abstraction has 261 states and 302 transitions. [2022-03-20 20:47:34,937 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.875) internal successors, (30), 13 states have internal predecessors, (30), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 6 states have call successors, (16) [2022-03-20 20:47:34,937 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 302 transitions. [2022-03-20 20:47:34,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-03-20 20:47:34,938 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:47:34,938 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:47:34,955 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 20:47:35,155 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 20:47:35,155 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:47:35,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:47:35,155 INFO L85 PathProgramCache]: Analyzing trace with hash -792800609, now seen corresponding path program 5 times [2022-03-20 20:47:35,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:47:35,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1949037396] [2022-03-20 20:47:35,156 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:47:35,156 INFO L85 PathProgramCache]: Analyzing trace with hash -792800609, now seen corresponding path program 6 times [2022-03-20 20:47:35,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:47:35,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029554402] [2022-03-20 20:47:35,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:47:35,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:47:35,161 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:47:35,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1963018605] [2022-03-20 20:47:35,162 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 20:47:35,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:47:35,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:47:35,163 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 20:47:35,166 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 20:47:35,255 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 20:47:35,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:47:35,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-20 20:47:35,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:47:35,536 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 72 proven. 20 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-03-20 20:47:35,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:47:35,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:47:35,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029554402] [2022-03-20 20:47:35,848 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:47:35,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963018605] [2022-03-20 20:47:35,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963018605] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 20:47:35,849 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 20:47:35,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-03-20 20:47:35,849 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:47:35,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1949037396] [2022-03-20 20:47:35,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1949037396] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:47:35,849 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:47:35,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 20:47:35,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027820268] [2022-03-20 20:47:35,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:47:35,850 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 20:47:35,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:47:35,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 20:47:35,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-03-20 20:47:35,850 INFO L87 Difference]: Start difference. First operand 261 states and 302 transitions. Second operand has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-20 20:47:36,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:47:36,038 INFO L93 Difference]: Finished difference Result 280 states and 325 transitions. [2022-03-20 20:47:36,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 20:47:36,039 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 97 [2022-03-20 20:47:36,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:47:36,040 INFO L225 Difference]: With dead ends: 280 [2022-03-20 20:47:36,040 INFO L226 Difference]: Without dead ends: 278 [2022-03-20 20:47:36,041 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2022-03-20 20:47:36,042 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 19 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 20:47:36,042 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 159 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 20:47:36,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-03-20 20:47:36,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 245. [2022-03-20 20:47:36,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 152 states have (on average 1.0921052631578947) internal successors, (166), 157 states have internal predecessors, (166), 57 states have call successors, (57), 36 states have call predecessors, (57), 35 states have return successors, (56), 51 states have call predecessors, (56), 56 states have call successors, (56) [2022-03-20 20:47:36,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 279 transitions. [2022-03-20 20:47:36,086 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 279 transitions. Word has length 97 [2022-03-20 20:47:36,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:47:36,086 INFO L478 AbstractCegarLoop]: Abstraction has 245 states and 279 transitions. [2022-03-20 20:47:36,087 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-20 20:47:36,087 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 279 transitions. [2022-03-20 20:47:36,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-03-20 20:47:36,087 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:47:36,088 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:47:36,107 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 20:47:36,308 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 20:47:36,308 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:47:36,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:47:36,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1750450403, now seen corresponding path program 17 times [2022-03-20 20:47:36,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:47:36,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [523208054] [2022-03-20 20:47:36,309 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:47:36,309 INFO L85 PathProgramCache]: Analyzing trace with hash -1750450403, now seen corresponding path program 18 times [2022-03-20 20:47:36,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:47:36,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603939683] [2022-03-20 20:47:36,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:47:36,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:47:36,328 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:47:36,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1843787162] [2022-03-20 20:47:36,329 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 20:47:36,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:47:36,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:47:36,344 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 20:47:36,349 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 20:47:36,908 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 20:47:36,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:47:36,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 42 conjunts are in the unsatisfiable core [2022-03-20 20:47:36,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:48:30,747 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 91 proven. 53 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2022-03-20 20:48:30,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:48:40,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:48:40,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603939683] [2022-03-20 20:48:40,930 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:48:40,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843787162] [2022-03-20 20:48:40,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843787162] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 20:48:40,930 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 20:48:40,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-03-20 20:48:40,931 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:48:40,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [523208054] [2022-03-20 20:48:40,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [523208054] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:48:40,931 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:48:40,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 20:48:40,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648896101] [2022-03-20 20:48:40,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:48:40,931 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 20:48:40,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:48:40,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 20:48:40,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=463, Unknown=4, NotChecked=0, Total=552 [2022-03-20 20:48:40,932 INFO L87 Difference]: Start difference. First operand 245 states and 279 transitions. Second operand has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 7 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) [2022-03-20 20:48:53,325 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 20:48:54,827 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 20:48:58,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:48:58,369 INFO L93 Difference]: Finished difference Result 284 states and 330 transitions. [2022-03-20 20:48:58,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 20:48:58,370 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 7 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) Word has length 110 [2022-03-20 20:48:58,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:48:58,371 INFO L225 Difference]: With dead ends: 284 [2022-03-20 20:48:58,371 INFO L226 Difference]: Without dead ends: 282 [2022-03-20 20:48:58,372 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 117 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 25.7s TimeCoverageRelationStatistics Valid=111, Invalid=640, Unknown=5, NotChecked=0, Total=756 [2022-03-20 20:48:58,372 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 26 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 11.4s IncrementalHoareTripleChecker+Time [2022-03-20 20:48:58,372 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 274 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 480 Invalid, 0 Unknown, 11 Unchecked, 11.4s Time] [2022-03-20 20:48:58,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2022-03-20 20:48:58,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 258. [2022-03-20 20:48:58,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 160 states have (on average 1.1) internal successors, (176), 164 states have internal predecessors, (176), 61 states have call successors, (61), 37 states have call predecessors, (61), 36 states have return successors, (60), 56 states have call predecessors, (60), 60 states have call successors, (60) [2022-03-20 20:48:58,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 297 transitions. [2022-03-20 20:48:58,422 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 297 transitions. Word has length 110 [2022-03-20 20:48:58,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:48:58,423 INFO L478 AbstractCegarLoop]: Abstraction has 258 states and 297 transitions. [2022-03-20 20:48:58,423 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 7 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) [2022-03-20 20:48:58,423 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 297 transitions. [2022-03-20 20:48:58,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-03-20 20:48:58,425 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:48:58,425 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:48:58,446 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 20:48:58,630 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 20:48:58,631 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:48:58,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:48:58,631 INFO L85 PathProgramCache]: Analyzing trace with hash 805225117, now seen corresponding path program 19 times [2022-03-20 20:48:58,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:48:58,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [546343222] [2022-03-20 20:48:58,632 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:48:58,632 INFO L85 PathProgramCache]: Analyzing trace with hash 805225117, now seen corresponding path program 20 times [2022-03-20 20:48:58,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:48:58,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131029625] [2022-03-20 20:48:58,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:48:58,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:48:58,647 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:48:58,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1846182364] [2022-03-20 20:48:58,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:48:58,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:48:58,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:48:58,661 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 20:48:58,661 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 20:48:58,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:48:58,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:48:58,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 58 conjunts are in the unsatisfiable core [2022-03-20 20:48:58,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:49:03,198 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 78 proven. 71 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2022-03-20 20:49:03,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:49:04,336 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 102 proven. 26 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2022-03-20 20:49:04,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:49:04,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131029625] [2022-03-20 20:49:04,336 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:49:04,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846182364] [2022-03-20 20:49:04,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846182364] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:49:04,336 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:49:04,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10] total 22 [2022-03-20 20:49:04,337 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:49:04,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [546343222] [2022-03-20 20:49:04,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [546343222] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:49:04,337 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:49:04,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 20:49:04,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37352727] [2022-03-20 20:49:04,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:49:04,338 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 20:49:04,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:49:04,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 20:49:04,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=389, Unknown=1, NotChecked=0, Total=462 [2022-03-20 20:49:04,339 INFO L87 Difference]: Start difference. First operand 258 states and 297 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 14 states have internal predecessors, (33), 8 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) [2022-03-20 20:49:05,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:49:05,512 INFO L93 Difference]: Finished difference Result 290 states and 338 transitions. [2022-03-20 20:49:05,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 20:49:05,513 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 14 states have internal predecessors, (33), 8 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) Word has length 110 [2022-03-20 20:49:05,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:49:05,515 INFO L225 Difference]: With dead ends: 290 [2022-03-20 20:49:05,515 INFO L226 Difference]: Without dead ends: 288 [2022-03-20 20:49:05,515 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 197 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=90, Invalid=509, Unknown=1, NotChecked=0, Total=600 [2022-03-20 20:49:05,516 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 25 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-20 20:49:05,516 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 367 Invalid, 619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 526 Invalid, 0 Unknown, 67 Unchecked, 1.1s Time] [2022-03-20 20:49:05,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2022-03-20 20:49:05,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 271. [2022-03-20 20:49:05,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 167 states have (on average 1.1017964071856288) internal successors, (184), 172 states have internal predecessors, (184), 66 states have call successors, (66), 38 states have call predecessors, (66), 37 states have return successors, (65), 60 states have call predecessors, (65), 65 states have call successors, (65) [2022-03-20 20:49:05,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 315 transitions. [2022-03-20 20:49:05,582 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 315 transitions. Word has length 110 [2022-03-20 20:49:05,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:49:05,583 INFO L478 AbstractCegarLoop]: Abstraction has 271 states and 315 transitions. [2022-03-20 20:49:05,583 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 14 states have internal predecessors, (33), 8 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) [2022-03-20 20:49:05,583 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 315 transitions. [2022-03-20 20:49:05,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-03-20 20:49:05,584 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:49:05,584 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:49:05,600 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 20:49:05,799 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 20:49:05,799 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:49:05,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:49:05,800 INFO L85 PathProgramCache]: Analyzing trace with hash -2103538785, now seen corresponding path program 21 times [2022-03-20 20:49:05,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:49:05,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1706813377] [2022-03-20 20:49:05,800 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:49:05,800 INFO L85 PathProgramCache]: Analyzing trace with hash -2103538785, now seen corresponding path program 22 times [2022-03-20 20:49:05,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:49:05,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833455630] [2022-03-20 20:49:05,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:49:05,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:49:05,807 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:49:05,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [457029703] [2022-03-20 20:49:05,807 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 20:49:05,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:49:05,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:49:05,809 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 20:49:05,809 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 20:49:05,877 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 20:49:05,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:49:05,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 61 conjunts are in the unsatisfiable core [2022-03-20 20:49:05,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:49:07,333 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 71 proven. 102 refuted. 0 times theorem prover too weak. 237 trivial. 0 not checked. [2022-03-20 20:49:07,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:49:08,099 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 91 proven. 45 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2022-03-20 20:49:08,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:49:08,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833455630] [2022-03-20 20:49:08,099 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:49:08,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457029703] [2022-03-20 20:49:08,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457029703] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:49:08,099 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:49:08,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 23 [2022-03-20 20:49:08,100 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:49:08,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1706813377] [2022-03-20 20:49:08,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1706813377] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:49:08,100 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:49:08,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 20:49:08,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893311380] [2022-03-20 20:49:08,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:49:08,111 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 20:49:08,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:49:08,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 20:49:08,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2022-03-20 20:49:08,112 INFO L87 Difference]: Start difference. First operand 271 states and 315 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 14 states have internal predecessors, (33), 8 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) [2022-03-20 20:49:09,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:49:09,023 INFO L93 Difference]: Finished difference Result 308 states and 357 transitions. [2022-03-20 20:49:09,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 20:49:09,024 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 14 states have internal predecessors, (33), 8 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) Word has length 110 [2022-03-20 20:49:09,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:49:09,025 INFO L225 Difference]: With dead ends: 308 [2022-03-20 20:49:09,025 INFO L226 Difference]: Without dead ends: 306 [2022-03-20 20:49:09,026 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 196 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2022-03-20 20:49:09,026 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 24 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-20 20:49:09,026 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 398 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 570 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-20 20:49:09,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2022-03-20 20:49:09,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 264. [2022-03-20 20:49:09,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 164 states have (on average 1.0914634146341464) internal successors, (179), 169 states have internal predecessors, (179), 61 states have call successors, (61), 39 states have call predecessors, (61), 38 states have return successors, (60), 55 states have call predecessors, (60), 60 states have call successors, (60) [2022-03-20 20:49:09,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 300 transitions. [2022-03-20 20:49:09,082 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 300 transitions. Word has length 110 [2022-03-20 20:49:09,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:49:09,082 INFO L478 AbstractCegarLoop]: Abstraction has 264 states and 300 transitions. [2022-03-20 20:49:09,082 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 14 states have internal predecessors, (33), 8 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) [2022-03-20 20:49:09,082 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 300 transitions. [2022-03-20 20:49:09,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-03-20 20:49:09,083 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:49:09,083 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:49:09,102 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 20:49:09,291 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 20:49:09,291 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:49:09,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:49:09,291 INFO L85 PathProgramCache]: Analyzing trace with hash -527866339, now seen corresponding path program 23 times [2022-03-20 20:49:09,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:49:09,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1797551806] [2022-03-20 20:49:09,293 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:49:09,293 INFO L85 PathProgramCache]: Analyzing trace with hash -527866339, now seen corresponding path program 24 times [2022-03-20 20:49:09,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:49:09,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578935070] [2022-03-20 20:49:09,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:49:09,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:49:09,298 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:49:09,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [150860165] [2022-03-20 20:49:09,298 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 20:49:09,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:49:09,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:49:09,311 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 20:49:09,312 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 20:49:09,663 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 20:49:09,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:49:09,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 60 conjunts are in the unsatisfiable core [2022-03-20 20:49:09,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:49:11,308 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 115 proven. 48 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2022-03-20 20:49:11,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:49:12,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:49:12,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578935070] [2022-03-20 20:49:12,782 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:49:12,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150860165] [2022-03-20 20:49:12,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150860165] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 20:49:12,783 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 20:49:12,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-03-20 20:49:12,783 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:49:12,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1797551806] [2022-03-20 20:49:12,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1797551806] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:49:12,783 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:49:12,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-20 20:49:12,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343446336] [2022-03-20 20:49:12,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:49:12,783 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 20:49:12,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:49:12,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 20:49:12,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2022-03-20 20:49:12,784 INFO L87 Difference]: Start difference. First operand 264 states and 300 transitions. Second operand has 18 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 13 states have internal predecessors, (29), 10 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 9 states have call predecessors, (15), 9 states have call successors, (15) [2022-03-20 20:49:15,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:49:15,382 INFO L93 Difference]: Finished difference Result 312 states and 361 transitions. [2022-03-20 20:49:15,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 20:49:15,383 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 13 states have internal predecessors, (29), 10 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 9 states have call predecessors, (15), 9 states have call successors, (15) Word has length 110 [2022-03-20 20:49:15,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:49:15,384 INFO L225 Difference]: With dead ends: 312 [2022-03-20 20:49:15,384 INFO L226 Difference]: Without dead ends: 310 [2022-03-20 20:49:15,384 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=142, Invalid=670, Unknown=0, NotChecked=0, Total=812 [2022-03-20 20:49:15,385 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 29 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 20:49:15,385 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 240 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 298 Invalid, 0 Unknown, 46 Unchecked, 0.5s Time] [2022-03-20 20:49:15,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2022-03-20 20:49:15,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 274. [2022-03-20 20:49:15,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 170 states have (on average 1.0941176470588236) internal successors, (186), 175 states have internal predecessors, (186), 64 states have call successors, (64), 40 states have call predecessors, (64), 39 states have return successors, (63), 58 states have call predecessors, (63), 63 states have call successors, (63) [2022-03-20 20:49:15,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 313 transitions. [2022-03-20 20:49:15,460 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 313 transitions. Word has length 110 [2022-03-20 20:49:15,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:49:15,460 INFO L478 AbstractCegarLoop]: Abstraction has 274 states and 313 transitions. [2022-03-20 20:49:15,460 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 13 states have internal predecessors, (29), 10 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 9 states have call predecessors, (15), 9 states have call successors, (15) [2022-03-20 20:49:15,460 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 313 transitions. [2022-03-20 20:49:15,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-03-20 20:49:15,461 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:49:15,461 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:49:15,479 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-03-20 20:49:15,666 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 20:49:15,667 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:49:15,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:49:15,667 INFO L85 PathProgramCache]: Analyzing trace with hash 858337055, now seen corresponding path program 25 times [2022-03-20 20:49:15,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:49:15,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1220162463] [2022-03-20 20:49:15,667 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:49:15,667 INFO L85 PathProgramCache]: Analyzing trace with hash 858337055, now seen corresponding path program 26 times [2022-03-20 20:49:15,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:49:15,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945725528] [2022-03-20 20:49:15,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:49:15,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:49:15,678 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:49:15,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [69498763] [2022-03-20 20:49:15,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:49:15,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:49:15,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:49:15,680 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 20:49:15,681 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 20:49:15,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:49:15,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:49:15,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 62 conjunts are in the unsatisfiable core [2022-03-20 20:49:15,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:49:26,177 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 107 proven. 66 refuted. 0 times theorem prover too weak. 237 trivial. 0 not checked. [2022-03-20 20:49:26,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:49:27,102 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 105 proven. 8 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2022-03-20 20:49:27,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:49:27,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945725528] [2022-03-20 20:49:27,103 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:49:27,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69498763] [2022-03-20 20:49:27,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69498763] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:49:27,106 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:49:27,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9] total 22 [2022-03-20 20:49:27,106 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:49:27,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1220162463] [2022-03-20 20:49:27,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1220162463] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:49:27,106 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:49:27,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-20 20:49:27,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152045816] [2022-03-20 20:49:27,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:49:27,108 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 20:49:27,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:49:27,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 20:49:27,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2022-03-20 20:49:27,109 INFO L87 Difference]: Start difference. First operand 274 states and 313 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 15 states have internal predecessors, (33), 8 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 9 states have call predecessors, (18), 8 states have call successors, (18) [2022-03-20 20:49:31,612 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.22s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 20:49:32,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:49:32,379 INFO L93 Difference]: Finished difference Result 298 states and 344 transitions. [2022-03-20 20:49:32,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 20:49:32,388 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 15 states have internal predecessors, (33), 8 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 9 states have call predecessors, (18), 8 states have call successors, (18) Word has length 110 [2022-03-20 20:49:32,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:49:32,390 INFO L225 Difference]: With dead ends: 298 [2022-03-20 20:49:32,390 INFO L226 Difference]: Without dead ends: 296 [2022-03-20 20:49:32,390 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 197 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2022-03-20 20:49:32,390 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 23 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 18 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-03-20 20:49:32,390 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 434 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 584 Invalid, 1 Unknown, 68 Unchecked, 5.1s Time] [2022-03-20 20:49:32,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-03-20 20:49:32,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 258. [2022-03-20 20:49:32,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 160 states have (on average 1.1) internal successors, (176), 164 states have internal predecessors, (176), 61 states have call successors, (61), 37 states have call predecessors, (61), 36 states have return successors, (60), 56 states have call predecessors, (60), 60 states have call successors, (60) [2022-03-20 20:49:32,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 297 transitions. [2022-03-20 20:49:32,460 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 297 transitions. Word has length 110 [2022-03-20 20:49:32,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:49:32,460 INFO L478 AbstractCegarLoop]: Abstraction has 258 states and 297 transitions. [2022-03-20 20:49:32,461 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 15 states have internal predecessors, (33), 8 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 9 states have call predecessors, (18), 8 states have call successors, (18) [2022-03-20 20:49:32,461 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 297 transitions. [2022-03-20 20:49:32,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-03-20 20:49:32,462 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:49:32,462 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:49:32,480 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-20 20:49:32,678 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 20:49:32,678 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:49:32,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:49:32,678 INFO L85 PathProgramCache]: Analyzing trace with hash -880954721, now seen corresponding path program 27 times [2022-03-20 20:49:32,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:49:32,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [592216847] [2022-03-20 20:49:32,679 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:49:32,679 INFO L85 PathProgramCache]: Analyzing trace with hash -880954721, now seen corresponding path program 28 times [2022-03-20 20:49:32,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:49:32,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952733746] [2022-03-20 20:49:32,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:49:32,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:49:32,684 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:49:32,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1358446911] [2022-03-20 20:49:32,684 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 20:49:32,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:49:32,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:49:32,686 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 20:49:32,686 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 20:49:32,780 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 20:49:32,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:49:32,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 61 conjunts are in the unsatisfiable core [2022-03-20 20:49:32,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:49:34,410 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 20:49:38,567 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 75 proven. 77 refuted. 0 times theorem prover too weak. 258 trivial. 0 not checked. [2022-03-20 20:49:38,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:49:39,193 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 103 proven. 33 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2022-03-20 20:49:39,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:49:39,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952733746] [2022-03-20 20:49:39,194 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:49:39,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358446911] [2022-03-20 20:49:39,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358446911] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:49:39,194 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:49:39,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12] total 24 [2022-03-20 20:49:39,194 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:49:39,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [592216847] [2022-03-20 20:49:39,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [592216847] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:49:39,195 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:49:39,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-20 20:49:39,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849766473] [2022-03-20 20:49:39,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:49:39,195 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 20:49:39,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:49:39,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 20:49:39,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2022-03-20 20:49:39,195 INFO L87 Difference]: Start difference. First operand 258 states and 297 transitions. Second operand has 17 states, 16 states have (on average 2.0625) internal successors, (33), 13 states have internal predecessors, (33), 8 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 9 states have call predecessors, (18), 8 states have call successors, (18) [2022-03-20 20:49:39,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:49:39,866 INFO L93 Difference]: Finished difference Result 316 states and 363 transitions. [2022-03-20 20:49:39,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 20:49:39,867 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0625) internal successors, (33), 13 states have internal predecessors, (33), 8 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 9 states have call predecessors, (18), 8 states have call successors, (18) Word has length 110 [2022-03-20 20:49:39,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:49:39,868 INFO L225 Difference]: With dead ends: 316 [2022-03-20 20:49:39,868 INFO L226 Difference]: Without dead ends: 314 [2022-03-20 20:49:39,868 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 195 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2022-03-20 20:49:39,869 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 22 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 20:49:39,869 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 288 Invalid, 536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 497 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 20:49:39,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-03-20 20:49:39,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 276. [2022-03-20 20:49:39,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 172 states have (on average 1.0988372093023255) internal successors, (189), 176 states have internal predecessors, (189), 64 states have call successors, (64), 40 states have call predecessors, (64), 39 states have return successors, (63), 59 states have call predecessors, (63), 63 states have call successors, (63) [2022-03-20 20:49:39,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 316 transitions. [2022-03-20 20:49:39,949 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 316 transitions. Word has length 110 [2022-03-20 20:49:39,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:49:39,949 INFO L478 AbstractCegarLoop]: Abstraction has 276 states and 316 transitions. [2022-03-20 20:49:39,949 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.0625) internal successors, (33), 13 states have internal predecessors, (33), 8 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 9 states have call predecessors, (18), 8 states have call successors, (18) [2022-03-20 20:49:39,949 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 316 transitions. [2022-03-20 20:49:39,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-03-20 20:49:39,950 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:49:39,950 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 14, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:49:39,968 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-20 20:49:40,166 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 20:49:40,166 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:49:40,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:49:40,167 INFO L85 PathProgramCache]: Analyzing trace with hash 769627864, now seen corresponding path program 29 times [2022-03-20 20:49:40,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:49:40,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [883489167] [2022-03-20 20:49:40,167 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:49:40,167 INFO L85 PathProgramCache]: Analyzing trace with hash 769627864, now seen corresponding path program 30 times [2022-03-20 20:49:40,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:49:40,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595335436] [2022-03-20 20:49:40,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:49:40,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:49:40,172 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:49:40,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2115283873] [2022-03-20 20:49:40,172 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 20:49:40,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:49:40,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:49:40,174 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 20:49:40,175 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 20:49:40,230 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 20:49:40,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:49:40,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-20 20:49:40,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:49:50,881 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 95 proven. 39 refuted. 0 times theorem prover too weak. 334 trivial. 0 not checked. [2022-03-20 20:49:50,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:49:51,213 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 117 proven. 5 refuted. 0 times theorem prover too weak. 346 trivial. 0 not checked. [2022-03-20 20:49:51,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:49:51,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595335436] [2022-03-20 20:49:51,213 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:49:51,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115283873] [2022-03-20 20:49:51,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115283873] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:49:51,213 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:49:51,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 14 [2022-03-20 20:49:51,213 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:49:51,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [883489167] [2022-03-20 20:49:51,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [883489167] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:49:51,214 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:49:51,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 20:49:51,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545150477] [2022-03-20 20:49:51,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:49:51,214 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 20:49:51,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:49:51,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 20:49:51,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=140, Unknown=1, NotChecked=0, Total=182 [2022-03-20 20:49:51,215 INFO L87 Difference]: Start difference. First operand 276 states and 316 transitions. Second operand has 11 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 4 states have call successors, (13) [2022-03-20 20:49:53,437 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 20:49:55,445 WARN L534 Checker$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 20:50:08,431 WARN L232 SmtUtils]: Spent 12.06s on a formula simplification. DAG size of input: 52 DAG size of output: 41 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 20:50:10,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:50:10,162 INFO L93 Difference]: Finished difference Result 338 states and 396 transitions. [2022-03-20 20:50:10,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 20:50:10,163 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 4 states have call successors, (13) Word has length 115 [2022-03-20 20:50:10,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:50:10,164 INFO L225 Difference]: With dead ends: 338 [2022-03-20 20:50:10,164 INFO L226 Difference]: Without dead ends: 336 [2022-03-20 20:50:10,164 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 215 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 18.5s TimeCoverageRelationStatistics Valid=60, Invalid=211, Unknown=1, NotChecked=0, Total=272 [2022-03-20 20:50:10,165 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 18 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 16 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-03-20 20:50:10,165 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 293 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 274 Invalid, 2 Unknown, 0 Unchecked, 6.7s Time] [2022-03-20 20:50:10,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2022-03-20 20:50:10,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 331. [2022-03-20 20:50:10,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 204 states have (on average 1.1029411764705883) internal successors, (225), 210 states have internal predecessors, (225), 81 states have call successors, (81), 46 states have call predecessors, (81), 45 states have return successors, (80), 74 states have call predecessors, (80), 80 states have call successors, (80) [2022-03-20 20:50:10,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 386 transitions. [2022-03-20 20:50:10,278 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 386 transitions. Word has length 115 [2022-03-20 20:50:10,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:50:10,279 INFO L478 AbstractCegarLoop]: Abstraction has 331 states and 386 transitions. [2022-03-20 20:50:10,279 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 4 states have call successors, (13) [2022-03-20 20:50:10,279 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 386 transitions. [2022-03-20 20:50:10,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-03-20 20:50:10,280 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:50:10,280 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 14, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:50:10,296 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 20:50:10,494 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 20:50:10,494 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:50:10,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:50:10,495 INFO L85 PathProgramCache]: Analyzing trace with hash 256983896, now seen corresponding path program 31 times [2022-03-20 20:50:10,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:50:10,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [515198702] [2022-03-20 20:50:10,495 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:50:10,495 INFO L85 PathProgramCache]: Analyzing trace with hash 256983896, now seen corresponding path program 32 times [2022-03-20 20:50:10,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:50:10,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458599426] [2022-03-20 20:50:10,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:50:10,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:50:10,503 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:50:10,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [4582546] [2022-03-20 20:50:10,504 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:50:10,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:50:10,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:50:10,506 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 20:50:10,507 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 20:50:10,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:50:10,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:50:10,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 64 conjunts are in the unsatisfiable core [2022-03-20 20:50:10,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:50:20,079 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 80 proven. 84 refuted. 0 times theorem prover too weak. 304 trivial. 0 not checked. [2022-03-20 20:50:20,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:50:21,234 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 109 proven. 31 refuted. 0 times theorem prover too weak. 328 trivial. 0 not checked. [2022-03-20 20:50:21,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:50:21,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458599426] [2022-03-20 20:50:21,234 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:50:21,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4582546] [2022-03-20 20:50:21,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4582546] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:50:21,234 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:50:21,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 11] total 24 [2022-03-20 20:50:21,235 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:50:21,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [515198702] [2022-03-20 20:50:21,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [515198702] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:50:21,235 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:50:21,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-20 20:50:21,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306600483] [2022-03-20 20:50:21,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:50:21,235 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 20:50:21,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:50:21,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 20:50:21,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2022-03-20 20:50:21,236 INFO L87 Difference]: Start difference. First operand 331 states and 386 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 15 states have internal predecessors, (33), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 10 states have call predecessors, (19), 9 states have call successors, (19) [2022-03-20 20:50:24,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:50:24,650 INFO L93 Difference]: Finished difference Result 357 states and 417 transitions. [2022-03-20 20:50:24,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 20:50:24,651 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 15 states have internal predecessors, (33), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 10 states have call predecessors, (19), 9 states have call successors, (19) Word has length 115 [2022-03-20 20:50:24,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:50:24,652 INFO L225 Difference]: With dead ends: 357 [2022-03-20 20:50:24,653 INFO L226 Difference]: Without dead ends: 355 [2022-03-20 20:50:24,653 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 206 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2022-03-20 20:50:24,654 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 34 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-03-20 20:50:24,655 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 305 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 532 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-03-20 20:50:24,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2022-03-20 20:50:24,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 348. [2022-03-20 20:50:24,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 215 states have (on average 1.1069767441860465) internal successors, (238), 220 states have internal predecessors, (238), 85 states have call successors, (85), 48 states have call predecessors, (85), 47 states have return successors, (84), 79 states have call predecessors, (84), 84 states have call successors, (84) [2022-03-20 20:50:24,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 407 transitions. [2022-03-20 20:50:24,785 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 407 transitions. Word has length 115 [2022-03-20 20:50:24,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:50:24,785 INFO L478 AbstractCegarLoop]: Abstraction has 348 states and 407 transitions. [2022-03-20 20:50:24,785 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 15 states have internal predecessors, (33), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 10 states have call predecessors, (19), 9 states have call successors, (19) [2022-03-20 20:50:24,785 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 407 transitions. [2022-03-20 20:50:24,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-03-20 20:50:24,786 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:50:24,786 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 14, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:50:24,803 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 20:50:24,999 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 20:50:24,999 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:50:24,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:50:25,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1986999402, now seen corresponding path program 33 times [2022-03-20 20:50:25,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:50:25,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1752442685] [2022-03-20 20:50:25,000 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:50:25,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1986999402, now seen corresponding path program 34 times [2022-03-20 20:50:25,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:50:25,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326405418] [2022-03-20 20:50:25,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:50:25,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:50:25,005 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:50:25,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1787577283] [2022-03-20 20:50:25,006 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 20:50:25,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:50:25,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:50:25,020 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 20:50:25,021 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 20:50:25,067 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 20:50:25,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:50:25,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-20 20:50:25,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:50:28,532 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 20:50:28,612 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 86 proven. 66 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2022-03-20 20:50:28,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:50:29,121 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 124 proven. 14 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2022-03-20 20:50:29,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:50:29,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326405418] [2022-03-20 20:50:29,122 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:50:29,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787577283] [2022-03-20 20:50:29,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787577283] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:50:29,122 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:50:29,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 22 [2022-03-20 20:50:29,122 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:50:29,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1752442685] [2022-03-20 20:50:29,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1752442685] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:50:29,122 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:50:29,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 20:50:29,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635879795] [2022-03-20 20:50:29,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:50:29,123 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 20:50:29,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:50:29,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 20:50:29,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2022-03-20 20:50:29,124 INFO L87 Difference]: Start difference. First operand 348 states and 407 transitions. Second operand has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 6 states have call successors, (19) [2022-03-20 20:50:29,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:50:29,902 INFO L93 Difference]: Finished difference Result 389 states and 452 transitions. [2022-03-20 20:50:29,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 20:50:29,902 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 6 states have call successors, (19) Word has length 115 [2022-03-20 20:50:29,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:50:29,904 INFO L225 Difference]: With dead ends: 389 [2022-03-20 20:50:29,904 INFO L226 Difference]: Without dead ends: 387 [2022-03-20 20:50:29,904 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 208 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=123, Invalid=429, Unknown=0, NotChecked=0, Total=552 [2022-03-20 20:50:29,904 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 18 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 20:50:29,904 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 397 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 461 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 20:50:29,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2022-03-20 20:50:30,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 387. [2022-03-20 20:50:30,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 241 states have (on average 1.107883817427386) internal successors, (267), 245 states have internal predecessors, (267), 92 states have call successors, (92), 54 states have call predecessors, (92), 53 states have return successors, (91), 87 states have call predecessors, (91), 91 states have call successors, (91) [2022-03-20 20:50:30,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 450 transitions. [2022-03-20 20:50:30,049 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 450 transitions. Word has length 115 [2022-03-20 20:50:30,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:50:30,049 INFO L478 AbstractCegarLoop]: Abstraction has 387 states and 450 transitions. [2022-03-20 20:50:30,049 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 6 states have call successors, (19) [2022-03-20 20:50:30,049 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 450 transitions. [2022-03-20 20:50:30,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-03-20 20:50:30,050 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:50:30,050 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 14, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:50:30,066 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 20:50:30,263 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 20:50:30,264 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:50:30,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:50:30,264 INFO L85 PathProgramCache]: Analyzing trace with hash 627101656, now seen corresponding path program 35 times [2022-03-20 20:50:30,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:50:30,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1493969345] [2022-03-20 20:50:30,264 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:50:30,264 INFO L85 PathProgramCache]: Analyzing trace with hash 627101656, now seen corresponding path program 36 times [2022-03-20 20:50:30,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:50:30,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934497149] [2022-03-20 20:50:30,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:50:30,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:50:30,271 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:50:30,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [503870577] [2022-03-20 20:50:30,271 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 20:50:30,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:50:30,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:50:30,272 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 20:50:30,274 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 20:50:30,318 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 20:50:30,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:50:30,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-20 20:50:30,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:50:30,618 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 99 proven. 39 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2022-03-20 20:50:30,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:50:32,868 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 117 proven. 5 refuted. 0 times theorem prover too weak. 346 trivial. 0 not checked. [2022-03-20 20:50:32,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:50:32,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934497149] [2022-03-20 20:50:32,869 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:50:32,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503870577] [2022-03-20 20:50:32,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503870577] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:50:32,869 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:50:32,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 14 [2022-03-20 20:50:32,869 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:50:32,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1493969345] [2022-03-20 20:50:32,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1493969345] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:50:32,869 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:50:32,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 20:50:32,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324638288] [2022-03-20 20:50:32,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:50:32,870 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 20:50:32,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:50:32,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 20:50:32,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=144, Unknown=1, NotChecked=0, Total=182 [2022-03-20 20:50:32,870 INFO L87 Difference]: Start difference. First operand 387 states and 450 transitions. Second operand has 11 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 6 states have call predecessors, (14), 4 states have call successors, (14) [2022-03-20 20:50:33,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:50:33,306 INFO L93 Difference]: Finished difference Result 397 states and 462 transitions. [2022-03-20 20:50:33,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 20:50:33,307 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 6 states have call predecessors, (14), 4 states have call successors, (14) Word has length 115 [2022-03-20 20:50:33,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:50:33,308 INFO L225 Difference]: With dead ends: 397 [2022-03-20 20:50:33,308 INFO L226 Difference]: Without dead ends: 395 [2022-03-20 20:50:33,308 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 215 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=56, Invalid=215, Unknown=1, NotChecked=0, Total=272 [2022-03-20 20:50:33,309 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 15 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 20:50:33,309 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 252 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 162 Invalid, 0 Unknown, 28 Unchecked, 0.2s Time] [2022-03-20 20:50:33,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2022-03-20 20:50:33,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 395. [2022-03-20 20:50:33,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 245 states have (on average 1.1061224489795918) internal successors, (271), 250 states have internal predecessors, (271), 95 states have call successors, (95), 55 states have call predecessors, (95), 54 states have return successors, (94), 89 states have call predecessors, (94), 94 states have call successors, (94) [2022-03-20 20:50:33,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 460 transitions. [2022-03-20 20:50:33,456 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 460 transitions. Word has length 115 [2022-03-20 20:50:33,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:50:33,456 INFO L478 AbstractCegarLoop]: Abstraction has 395 states and 460 transitions. [2022-03-20 20:50:33,456 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 6 states have call predecessors, (14), 4 states have call successors, (14) [2022-03-20 20:50:33,456 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 460 transitions. [2022-03-20 20:50:33,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-03-20 20:50:33,457 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:50:33,457 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 14, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:50:33,473 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 20:50:33,678 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 20:50:33,678 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:50:33,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:50:33,678 INFO L85 PathProgramCache]: Analyzing trace with hash -1616881642, now seen corresponding path program 37 times [2022-03-20 20:50:33,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:50:33,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [212817941] [2022-03-20 20:50:33,679 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:50:33,679 INFO L85 PathProgramCache]: Analyzing trace with hash -1616881642, now seen corresponding path program 38 times [2022-03-20 20:50:33,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:50:33,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217208270] [2022-03-20 20:50:33,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:50:33,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:50:33,685 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:50:33,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1853426666] [2022-03-20 20:50:33,685 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:50:33,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:50:33,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:50:33,687 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 20:50:33,723 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 20:50:33,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:50:33,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:50:33,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-20 20:50:33,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:50:46,863 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 80 proven. 72 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2022-03-20 20:50:46,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:50:49,931 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 112 proven. 26 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2022-03-20 20:50:49,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:50:49,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217208270] [2022-03-20 20:50:49,931 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:50:49,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853426666] [2022-03-20 20:50:49,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853426666] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:50:49,931 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:50:49,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2022-03-20 20:50:49,932 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:50:49,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [212817941] [2022-03-20 20:50:49,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [212817941] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:50:49,932 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:50:49,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 20:50:49,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498415465] [2022-03-20 20:50:49,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:50:49,932 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 20:50:49,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:50:49,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 20:50:49,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-03-20 20:50:49,933 INFO L87 Difference]: Start difference. First operand 395 states and 460 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 6 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 6 states have call successors, (19) [2022-03-20 20:50:54,403 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 20:50:54,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:50:54,709 INFO L93 Difference]: Finished difference Result 417 states and 488 transitions. [2022-03-20 20:50:54,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 20:50:54,710 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 6 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 6 states have call successors, (19) Word has length 115 [2022-03-20 20:50:54,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:50:54,711 INFO L225 Difference]: With dead ends: 417 [2022-03-20 20:50:54,711 INFO L226 Difference]: Without dead ends: 415 [2022-03-20 20:50:54,722 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 211 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-03-20 20:50:54,723 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 13 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-03-20 20:50:54,723 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 332 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 358 Invalid, 0 Unknown, 5 Unchecked, 4.5s Time] [2022-03-20 20:50:54,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2022-03-20 20:50:54,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 398. [2022-03-20 20:50:54,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 246 states have (on average 1.1056910569105691) internal successors, (272), 252 states have internal predecessors, (272), 97 states have call successors, (97), 55 states have call predecessors, (97), 54 states have return successors, (96), 90 states have call predecessors, (96), 96 states have call successors, (96) [2022-03-20 20:50:54,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 465 transitions. [2022-03-20 20:50:54,884 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 465 transitions. Word has length 115 [2022-03-20 20:50:54,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:50:54,884 INFO L478 AbstractCegarLoop]: Abstraction has 398 states and 465 transitions. [2022-03-20 20:50:54,884 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 6 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 6 states have call successors, (19) [2022-03-20 20:50:54,884 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 465 transitions. [2022-03-20 20:50:54,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-03-20 20:50:54,885 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:50:54,885 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 14, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:50:54,902 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 20:50:55,100 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 20:50:55,101 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:50:55,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:50:55,101 INFO L85 PathProgramCache]: Analyzing trace with hash -2129525610, now seen corresponding path program 39 times [2022-03-20 20:50:55,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:50:55,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1085830464] [2022-03-20 20:50:55,102 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:50:55,102 INFO L85 PathProgramCache]: Analyzing trace with hash -2129525610, now seen corresponding path program 40 times [2022-03-20 20:50:55,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:50:55,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332948511] [2022-03-20 20:50:55,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:50:55,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:50:55,122 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:50:55,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [260561705] [2022-03-20 20:50:55,122 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 20:50:55,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:50:55,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:50:55,140 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 20:50:55,144 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 20:50:55,190 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 20:50:55,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:50:55,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 65 conjunts are in the unsatisfiable core [2022-03-20 20:50:55,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:51:11,112 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 109 proven. 82 refuted. 0 times theorem prover too weak. 277 trivial. 0 not checked. [2022-03-20 20:51:11,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:51:11,777 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 117 proven. 5 refuted. 0 times theorem prover too weak. 346 trivial. 0 not checked. [2022-03-20 20:51:11,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:51:11,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332948511] [2022-03-20 20:51:11,778 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:51:11,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260561705] [2022-03-20 20:51:11,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260561705] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:51:11,778 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:51:11,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 10] total 26 [2022-03-20 20:51:11,778 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:51:11,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1085830464] [2022-03-20 20:51:11,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1085830464] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:51:11,778 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:51:11,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-20 20:51:11,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224151627] [2022-03-20 20:51:11,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:51:11,779 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-20 20:51:11,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:51:11,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-20 20:51:11,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=528, Unknown=1, NotChecked=0, Total=650 [2022-03-20 20:51:11,780 INFO L87 Difference]: Start difference. First operand 398 states and 465 transitions. Second operand has 20 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 14 states have internal predecessors, (33), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 11 states have call predecessors, (19), 8 states have call successors, (19) [2022-03-20 20:51:13,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:51:13,192 INFO L93 Difference]: Finished difference Result 451 states and 527 transitions. [2022-03-20 20:51:13,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-20 20:51:13,193 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 14 states have internal predecessors, (33), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 11 states have call predecessors, (19), 8 states have call successors, (19) Word has length 115 [2022-03-20 20:51:13,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:51:13,194 INFO L225 Difference]: With dead ends: 451 [2022-03-20 20:51:13,194 INFO L226 Difference]: Without dead ends: 400 [2022-03-20 20:51:13,195 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 204 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=139, Invalid=672, Unknown=1, NotChecked=0, Total=812 [2022-03-20 20:51:13,195 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 30 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-20 20:51:13,195 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 307 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 482 Invalid, 0 Unknown, 62 Unchecked, 1.2s Time] [2022-03-20 20:51:13,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2022-03-20 20:51:13,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 398. [2022-03-20 20:51:13,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 246 states have (on average 1.1016260162601625) internal successors, (271), 252 states have internal predecessors, (271), 97 states have call successors, (97), 55 states have call predecessors, (97), 54 states have return successors, (96), 90 states have call predecessors, (96), 96 states have call successors, (96) [2022-03-20 20:51:13,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 464 transitions. [2022-03-20 20:51:13,358 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 464 transitions. Word has length 115 [2022-03-20 20:51:13,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:51:13,358 INFO L478 AbstractCegarLoop]: Abstraction has 398 states and 464 transitions. [2022-03-20 20:51:13,358 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 14 states have internal predecessors, (33), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 11 states have call predecessors, (19), 8 states have call successors, (19) [2022-03-20 20:51:13,358 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 464 transitions. [2022-03-20 20:51:13,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-03-20 20:51:13,359 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:51:13,359 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:51:13,376 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-03-20 20:51:13,574 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 20:51:13,574 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:51:13,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:51:13,575 INFO L85 PathProgramCache]: Analyzing trace with hash -618835194, now seen corresponding path program 41 times [2022-03-20 20:51:13,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:51:13,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [894851113] [2022-03-20 20:51:13,575 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:51:13,575 INFO L85 PathProgramCache]: Analyzing trace with hash -618835194, now seen corresponding path program 42 times [2022-03-20 20:51:13,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:51:13,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281356818] [2022-03-20 20:51:13,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:51:13,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:51:13,591 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:51:13,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [512745840] [2022-03-20 20:51:13,591 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 20:51:13,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:51:13,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:51:13,599 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 20:51:13,600 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 20:51:14,113 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 20:51:14,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:51:14,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-20 20:51:14,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:51:14,650 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 138 proven. 35 refuted. 0 times theorem prover too weak. 438 trivial. 0 not checked. [2022-03-20 20:51:14,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:51:15,048 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 135 proven. 8 refuted. 0 times theorem prover too weak. 468 trivial. 0 not checked. [2022-03-20 20:51:15,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:51:15,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281356818] [2022-03-20 20:51:15,049 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:51:15,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512745840] [2022-03-20 20:51:15,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512745840] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:51:15,050 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:51:15,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 17 [2022-03-20 20:51:15,050 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:51:15,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [894851113] [2022-03-20 20:51:15,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [894851113] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:51:15,050 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:51:15,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 20:51:15,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849777438] [2022-03-20 20:51:15,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:51:15,050 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 20:51:15,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:51:15,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 20:51:15,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2022-03-20 20:51:15,051 INFO L87 Difference]: Start difference. First operand 398 states and 464 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 11 states have internal predecessors, (30), 4 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 6 states have call predecessors, (14), 4 states have call successors, (14) [2022-03-20 20:51:15,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:51:15,948 INFO L93 Difference]: Finished difference Result 469 states and 552 transitions. [2022-03-20 20:51:15,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 20:51:15,949 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 11 states have internal predecessors, (30), 4 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 6 states have call predecessors, (14), 4 states have call successors, (14) Word has length 128 [2022-03-20 20:51:15,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:51:15,950 INFO L225 Difference]: With dead ends: 469 [2022-03-20 20:51:15,950 INFO L226 Difference]: Without dead ends: 242 [2022-03-20 20:51:15,950 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 238 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-03-20 20:51:15,951 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 22 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 20:51:15,951 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 183 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 20:51:15,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-03-20 20:51:16,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 222. [2022-03-20 20:51:16,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 137 states have (on average 1.094890510948905) internal successors, (150), 139 states have internal predecessors, (150), 54 states have call successors, (54), 31 states have call predecessors, (54), 30 states have return successors, (53), 51 states have call predecessors, (53), 53 states have call successors, (53) [2022-03-20 20:51:16,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 257 transitions. [2022-03-20 20:51:16,044 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 257 transitions. Word has length 128 [2022-03-20 20:51:16,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:51:16,044 INFO L478 AbstractCegarLoop]: Abstraction has 222 states and 257 transitions. [2022-03-20 20:51:16,045 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 11 states have internal predecessors, (30), 4 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 6 states have call predecessors, (14), 4 states have call successors, (14) [2022-03-20 20:51:16,045 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 257 transitions. [2022-03-20 20:51:16,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-03-20 20:51:16,045 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:51:16,045 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:51:16,073 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 20:51:16,251 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 20:51:16,251 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:51:16,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:51:16,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1849654520, now seen corresponding path program 43 times [2022-03-20 20:51:16,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:51:16,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [908033694] [2022-03-20 20:51:16,252 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:51:16,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1849654520, now seen corresponding path program 44 times [2022-03-20 20:51:16,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:51:16,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636152275] [2022-03-20 20:51:16,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:51:16,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:51:16,257 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:51:16,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [480183034] [2022-03-20 20:51:16,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:51:16,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:51:16,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:51:16,258 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 20:51:16,259 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 20:51:16,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:51:16,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:51:16,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 20:51:16,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:51:16,571 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 108 proven. 66 refuted. 0 times theorem prover too weak. 437 trivial. 0 not checked. [2022-03-20 20:51:16,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:51:16,912 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 68 proven. 48 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2022-03-20 20:51:16,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:51:16,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636152275] [2022-03-20 20:51:16,913 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:51:16,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480183034] [2022-03-20 20:51:16,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480183034] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:51:16,914 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:51:16,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2022-03-20 20:51:16,914 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:51:16,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [908033694] [2022-03-20 20:51:16,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [908033694] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:51:16,914 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:51:16,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 20:51:16,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140569737] [2022-03-20 20:51:16,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:51:16,915 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 20:51:16,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:51:16,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 20:51:16,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2022-03-20 20:51:16,916 INFO L87 Difference]: Start difference. First operand 222 states and 257 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 8 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) [2022-03-20 20:51:17,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:51:17,299 INFO L93 Difference]: Finished difference Result 320 states and 405 transitions. [2022-03-20 20:51:17,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 20:51:17,300 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 8 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) Word has length 128 [2022-03-20 20:51:17,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:51:17,301 INFO L225 Difference]: With dead ends: 320 [2022-03-20 20:51:17,301 INFO L226 Difference]: Without dead ends: 292 [2022-03-20 20:51:17,302 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 238 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2022-03-20 20:51:17,302 INFO L913 BasicCegarLoop]: 56 mSDtfsCounter, 13 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 20:51:17,302 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 419 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 20:51:17,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2022-03-20 20:51:17,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 292. [2022-03-20 20:51:17,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 171 states have (on average 1.128654970760234) internal successors, (193), 174 states have internal predecessors, (193), 90 states have call successors, (90), 31 states have call predecessors, (90), 30 states have return successors, (89), 86 states have call predecessors, (89), 89 states have call successors, (89) [2022-03-20 20:51:17,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 372 transitions. [2022-03-20 20:51:17,457 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 372 transitions. Word has length 128 [2022-03-20 20:51:17,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:51:17,457 INFO L478 AbstractCegarLoop]: Abstraction has 292 states and 372 transitions. [2022-03-20 20:51:17,457 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 8 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) [2022-03-20 20:51:17,457 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 372 transitions. [2022-03-20 20:51:17,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-03-20 20:51:17,458 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:51:17,458 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:51:17,476 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 20:51:17,671 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 20:51:17,671 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:51:17,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:51:17,672 INFO L85 PathProgramCache]: Analyzing trace with hash 706021000, now seen corresponding path program 45 times [2022-03-20 20:51:17,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:51:17,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [64076477] [2022-03-20 20:51:17,672 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:51:17,672 INFO L85 PathProgramCache]: Analyzing trace with hash 706021000, now seen corresponding path program 46 times [2022-03-20 20:51:17,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:51:17,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087584011] [2022-03-20 20:51:17,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:51:17,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:51:17,677 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:51:17,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [813630068] [2022-03-20 20:51:17,677 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 20:51:17,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:51:17,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:51:17,692 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 20:51:17,693 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 20:51:17,740 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 20:51:17,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:51:17,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 20:51:17,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:51:18,011 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 120 proven. 54 refuted. 0 times theorem prover too weak. 437 trivial. 0 not checked. [2022-03-20 20:51:18,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:51:18,350 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 56 proven. 60 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2022-03-20 20:51:18,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:51:18,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087584011] [2022-03-20 20:51:18,350 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:51:18,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813630068] [2022-03-20 20:51:18,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813630068] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:51:18,350 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:51:18,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2022-03-20 20:51:18,351 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:51:18,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [64076477] [2022-03-20 20:51:18,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [64076477] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:51:18,351 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:51:18,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 20:51:18,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474488431] [2022-03-20 20:51:18,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:51:18,351 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 20:51:18,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:51:18,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 20:51:18,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2022-03-20 20:51:18,352 INFO L87 Difference]: Start difference. First operand 292 states and 372 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 8 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) [2022-03-20 20:51:18,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:51:18,692 INFO L93 Difference]: Finished difference Result 368 states and 478 transitions. [2022-03-20 20:51:18,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 20:51:18,697 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 8 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) Word has length 128 [2022-03-20 20:51:18,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:51:18,698 INFO L225 Difference]: With dead ends: 368 [2022-03-20 20:51:18,698 INFO L226 Difference]: Without dead ends: 294 [2022-03-20 20:51:18,699 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 238 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=139, Invalid=511, Unknown=0, NotChecked=0, Total=650 [2022-03-20 20:51:18,699 INFO L913 BasicCegarLoop]: 56 mSDtfsCounter, 13 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 20:51:18,699 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 416 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 20:51:18,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2022-03-20 20:51:18,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 294. [2022-03-20 20:51:18,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 173 states have (on average 1.1213872832369942) internal successors, (194), 175 states have internal predecessors, (194), 90 states have call successors, (90), 31 states have call predecessors, (90), 30 states have return successors, (89), 87 states have call predecessors, (89), 89 states have call successors, (89) [2022-03-20 20:51:18,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 373 transitions. [2022-03-20 20:51:18,861 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 373 transitions. Word has length 128 [2022-03-20 20:51:18,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:51:18,861 INFO L478 AbstractCegarLoop]: Abstraction has 294 states and 373 transitions. [2022-03-20 20:51:18,861 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 8 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) [2022-03-20 20:51:18,861 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 373 transitions. [2022-03-20 20:51:18,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-03-20 20:51:18,862 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:51:18,862 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:51:18,879 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-03-20 20:51:19,068 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 20:51:19,069 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:51:19,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:51:19,069 INFO L85 PathProgramCache]: Analyzing trace with hash 2092224394, now seen corresponding path program 47 times [2022-03-20 20:51:19,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:51:19,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1823606621] [2022-03-20 20:51:19,069 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:51:19,070 INFO L85 PathProgramCache]: Analyzing trace with hash 2092224394, now seen corresponding path program 48 times [2022-03-20 20:51:19,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:51:19,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331759711] [2022-03-20 20:51:19,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:51:19,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:51:19,078 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:51:19,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1772164673] [2022-03-20 20:51:19,078 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 20:51:19,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:51:19,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:51:19,080 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 20:51:19,081 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 20:51:19,168 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 20:51:19,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:51:19,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-20 20:51:19,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:51:19,364 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 176 proven. 18 refuted. 0 times theorem prover too weak. 417 trivial. 0 not checked. [2022-03-20 20:51:19,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:51:19,628 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 135 proven. 8 refuted. 0 times theorem prover too weak. 468 trivial. 0 not checked. [2022-03-20 20:51:19,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:51:19,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331759711] [2022-03-20 20:51:19,628 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:51:19,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772164673] [2022-03-20 20:51:19,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772164673] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:51:19,628 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:51:19,628 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2022-03-20 20:51:19,628 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:51:19,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1823606621] [2022-03-20 20:51:19,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1823606621] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:51:19,629 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:51:19,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 20:51:19,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379930860] [2022-03-20 20:51:19,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:51:19,629 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 20:51:19,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:51:19,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 20:51:19,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-03-20 20:51:19,630 INFO L87 Difference]: Start difference. First operand 294 states and 373 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2022-03-20 20:51:20,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:51:20,119 INFO L93 Difference]: Finished difference Result 294 states and 373 transitions. [2022-03-20 20:51:20,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 20:51:20,120 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 128 [2022-03-20 20:51:20,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:51:20,121 INFO L225 Difference]: With dead ends: 294 [2022-03-20 20:51:20,121 INFO L226 Difference]: Without dead ends: 0 [2022-03-20 20:51:20,121 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 241 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-03-20 20:51:20,122 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 11 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 20:51:20,122 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 216 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 103 Invalid, 0 Unknown, 16 Unchecked, 0.3s Time] [2022-03-20 20:51:20,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-20 20:51:20,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-20 20:51:20,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-20 20:51:20,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-20 20:51:20,123 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 128 [2022-03-20 20:51:20,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:51:20,123 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-20 20:51:20,123 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2022-03-20 20:51:20,123 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-20 20:51:20,123 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-20 20:51:20,125 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-20 20:51:20,141 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 20:51:20,337 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 20:51:20,339 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-20 20:51:25,607 WARN L232 SmtUtils]: Spent 5.19s on a formula simplification. DAG size of input: 790 DAG size of output: 770 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-03-20 20:51:38,227 WARN L232 SmtUtils]: Spent 12.49s on a formula simplification. DAG size of input: 776 DAG size of output: 763 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-03-20 20:51:53,626 WARN L232 SmtUtils]: Spent 12.39s on a formula simplification. DAG size of input: 767 DAG size of output: 754 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-03-20 20:52:30,183 WARN L232 SmtUtils]: Spent 30.64s on a formula simplification. DAG size of input: 80 DAG size of output: 48 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-03-20 20:52:44,693 WARN L232 SmtUtils]: Spent 14.49s on a formula simplification. DAG size of input: 328 DAG size of output: 25 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-03-20 20:52:53,138 WARN L232 SmtUtils]: Spent 8.44s on a formula simplification. DAG size of input: 82 DAG size of output: 46 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-03-20 20:55:29,979 WARN L232 SmtUtils]: Spent 2.61m on a formula simplification. DAG size of input: 646 DAG size of output: 29 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-03-20 20:56:50,278 WARN L232 SmtUtils]: Spent 1.34m on a formula simplification. DAG size of input: 357 DAG size of output: 63 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter)