/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/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_valuebound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 14:11:54,699 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 14:11:54,722 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 14:11:54,756 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 14:11:54,775 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 14:11:54,778 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 14:11:54,780 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 14:11:54,780 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-03-20 14:11:54,786 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 14:11:54,787 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 14:11:54,788 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 14:11:54,788 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 14:11:54,788 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 14:11:54,788 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 14:11:54,789 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 14:11:54,789 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 14:11:54,789 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 14:11:54,789 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 14:11:54,789 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 14:11:54,789 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 14:11:54,790 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 14:11:54,790 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 14:11:54,790 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 14:11:54,790 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 14:11:54,790 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 14:11:54,790 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 14:11:54,790 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 14:11:54,790 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 14:11:54,790 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-20 14:11:54,790 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-20 14:11:54,790 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-20 14:11:54,790 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 14:11:54,791 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-03-20 14:11:54,791 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 14:11:54,972 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 14:11:54,988 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 14:11:54,990 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 14:11:54,991 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 14:11:54,991 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 14:11:54,992 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_valuebound100.c [2022-03-20 14:11:55,048 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce17bdbab/e238f1b729034e39bcd62840f4d24c6b/FLAG8452b1d0b [2022-03-20 14:11:55,374 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 14:11:55,374 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_valuebound100.c [2022-03-20 14:11:55,378 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce17bdbab/e238f1b729034e39bcd62840f4d24c6b/FLAG8452b1d0b [2022-03-20 14:11:55,820 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce17bdbab/e238f1b729034e39bcd62840f4d24c6b [2022-03-20 14:11:55,822 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 14:11:55,823 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 14:11:55,827 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 14:11:55,827 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 14:11:55,829 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 14:11:55,829 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 02:11:55" (1/1) ... [2022-03-20 14:11:55,830 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1bfa8e14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:11:55, skipping insertion in model container [2022-03-20 14:11:55,830 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 02:11:55" (1/1) ... [2022-03-20 14:11:55,834 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 14:11:55,842 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 14:11:55,936 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/cohendiv-ll_valuebound100.c[576,589] [2022-03-20 14:11:55,946 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 14:11:55,950 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 14:11:55,958 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/cohendiv-ll_valuebound100.c[576,589] [2022-03-20 14:11:55,962 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 14:11:55,969 INFO L208 MainTranslator]: Completed translation [2022-03-20 14:11:55,969 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:11:55 WrapperNode [2022-03-20 14:11:55,969 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 14:11:55,970 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 14:11:55,970 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 14:11:55,970 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 14:11:55,980 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:11:55" (1/1) ... [2022-03-20 14:11:55,980 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:11:55" (1/1) ... [2022-03-20 14:11:55,985 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:11:55" (1/1) ... [2022-03-20 14:11:55,986 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:11:55" (1/1) ... [2022-03-20 14:11:55,992 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:11:55" (1/1) ... [2022-03-20 14:11:55,994 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:11:55" (1/1) ... [2022-03-20 14:11:55,994 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:11:55" (1/1) ... [2022-03-20 14:11:55,995 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 14:11:55,996 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 14:11:55,996 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 14:11:55,996 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 14:11:55,997 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:11:55" (1/1) ... [2022-03-20 14:11:56,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 14:11:56,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:11:56,020 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 14:11:56,026 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 14:11:56,043 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 14:11:56,043 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 14:11:56,044 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 14:11:56,044 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 14:11:56,044 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 14:11:56,044 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 14:11:56,044 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 14:11:56,044 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 14:11:56,044 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 14:11:56,044 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 14:11:56,044 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 14:11:56,044 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 14:11:56,044 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 14:11:56,044 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 14:11:56,044 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 14:11:56,044 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 14:11:56,045 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 14:11:56,045 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 14:11:56,045 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 14:11:56,045 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 14:11:56,089 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 14:11:56,090 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 14:11:56,169 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 14:11:56,173 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 14:11:56,173 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-20 14:11:56,174 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 02:11:56 BoogieIcfgContainer [2022-03-20 14:11:56,174 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 14:11:56,175 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 14:11:56,175 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 14:11:56,177 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 14:11:56,177 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 02:11:55" (1/3) ... [2022-03-20 14:11:56,178 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33842087 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 02:11:56, skipping insertion in model container [2022-03-20 14:11:56,178 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:11:55" (2/3) ... [2022-03-20 14:11:56,178 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33842087 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 02:11:56, skipping insertion in model container [2022-03-20 14:11:56,178 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 02:11:56" (3/3) ... [2022-03-20 14:11:56,179 INFO L111 eAbstractionObserver]: Analyzing ICFG cohendiv-ll_valuebound100.c [2022-03-20 14:11:56,182 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-20 14:11:56,182 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 14:11:56,206 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 14:11:56,210 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 14:11:56,210 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 14:11:56,218 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 22 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-20 14:11:56,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-20 14:11:56,223 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:11:56,224 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:11:56,224 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:11:56,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:11:56,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1768835633, now seen corresponding path program 1 times [2022-03-20 14:11:56,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:11:56,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1382316493] [2022-03-20 14:11:56,239 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:11:56,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1768835633, now seen corresponding path program 2 times [2022-03-20 14:11:56,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:11:56,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205098066] [2022-03-20 14:11:56,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:11:56,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:11:56,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 14:11:56,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 14:11:56,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 14:11:56,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 14:11:56,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 14:11:56,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 14:11:56,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 14:11:56,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-20 14:11:56,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 14:11:56,472 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 14:11:56,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:11:56,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205098066] [2022-03-20 14:11:56,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205098066] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:11:56,474 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:11:56,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 14:11:56,476 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:11:56,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1382316493] [2022-03-20 14:11:56,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1382316493] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:11:56,476 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:11:56,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 14:11:56,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637381320] [2022-03-20 14:11:56,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:11:56,479 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 14:11:56,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:11:56,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 14:11:56,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 14:11:56,507 INFO L87 Difference]: Start difference. First operand has 39 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 22 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 14:11:56,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:11:56,598 INFO L93 Difference]: Finished difference Result 71 states and 110 transitions. [2022-03-20 14:11:56,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 14:11:56,600 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2022-03-20 14:11:56,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:11:56,607 INFO L225 Difference]: With dead ends: 71 [2022-03-20 14:11:56,607 INFO L226 Difference]: Without dead ends: 34 [2022-03-20 14:11:56,610 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 14:11:56,613 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 21 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 14:11:56,615 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 41 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 14:11:56,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-03-20 14:11:56,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-03-20 14:11:56,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 14:11:56,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2022-03-20 14:11:56,662 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 28 [2022-03-20 14:11:56,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:11:56,662 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2022-03-20 14:11:56,662 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 14:11:56,662 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2022-03-20 14:11:56,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-20 14:11:56,663 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:11:56,663 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:11:56,663 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 14:11:56,664 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:11:56,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:11:56,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1378913883, now seen corresponding path program 1 times [2022-03-20 14:11:56,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:11:56,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [407264541] [2022-03-20 14:11:56,665 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:11:56,665 INFO L85 PathProgramCache]: Analyzing trace with hash 1378913883, now seen corresponding path program 2 times [2022-03-20 14:11:56,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:11:56,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33647471] [2022-03-20 14:11:56,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:11:56,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:11:56,684 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:11:56,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2089904816] [2022-03-20 14:11:56,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:11:56,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:11:56,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:11:56,686 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 14:11:56,687 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 14:11:56,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-20 14:11:56,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:11:56,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 14:11:56,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:11:56,854 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 14:11:56,854 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 14:11:56,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:11:56,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33647471] [2022-03-20 14:11:56,855 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:11:56,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089904816] [2022-03-20 14:11:56,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089904816] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:11:56,856 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:11:56,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 14:11:56,857 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:11:56,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [407264541] [2022-03-20 14:11:56,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [407264541] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:11:56,863 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:11:56,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 14:11:56,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873810485] [2022-03-20 14:11:56,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:11:56,864 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 14:11:56,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:11:56,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 14:11:56,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 14:11:56,864 INFO L87 Difference]: Start difference. First operand 34 states and 43 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-20 14:11:56,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:11:56,920 INFO L93 Difference]: Finished difference Result 45 states and 56 transitions. [2022-03-20 14:11:56,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 14:11:56,920 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2022-03-20 14:11:56,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:11:56,921 INFO L225 Difference]: With dead ends: 45 [2022-03-20 14:11:56,921 INFO L226 Difference]: Without dead ends: 43 [2022-03-20 14:11:56,921 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 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 14:11:56,922 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 6 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 14:11:56,923 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 153 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 14:11:56,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-03-20 14:11:56,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2022-03-20 14:11:56,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 24 states have internal predecessors, (25), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-20 14:11:56,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2022-03-20 14:11:56,931 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 28 [2022-03-20 14:11:56,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:11:56,931 INFO L478 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2022-03-20 14:11:56,931 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-20 14:11:56,931 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2022-03-20 14:11:56,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-20 14:11:56,932 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:11:56,932 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:11:56,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 14:11:57,150 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 14:11:57,151 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:11:57,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:11:57,151 INFO L85 PathProgramCache]: Analyzing trace with hash -1928335320, now seen corresponding path program 1 times [2022-03-20 14:11:57,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:11:57,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [474791613] [2022-03-20 14:11:57,152 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:11:57,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1928335320, now seen corresponding path program 2 times [2022-03-20 14:11:57,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:11:57,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616249637] [2022-03-20 14:11:57,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:11:57,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:11:57,168 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:11:57,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1453020266] [2022-03-20 14:11:57,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:11:57,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:11:57,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:11:57,179 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 14:11:57,181 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 14:11:57,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 14:11:57,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:11:57,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-20 14:11:57,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:11:57,362 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-20 14:11:57,362 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 14:11:57,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:11:57,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616249637] [2022-03-20 14:11:57,363 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:11:57,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453020266] [2022-03-20 14:11:57,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453020266] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:11:57,363 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:11:57,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 14:11:57,364 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:11:57,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [474791613] [2022-03-20 14:11:57,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [474791613] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:11:57,364 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:11:57,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 14:11:57,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571485072] [2022-03-20 14:11:57,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:11:57,365 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 14:11:57,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:11:57,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 14:11:57,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-03-20 14:11:57,367 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand has 9 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-20 14:11:57,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:11:57,498 INFO L93 Difference]: Finished difference Result 57 states and 72 transitions. [2022-03-20 14:11:57,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 14:11:57,499 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 33 [2022-03-20 14:11:57,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:11:57,504 INFO L225 Difference]: With dead ends: 57 [2022-03-20 14:11:57,504 INFO L226 Difference]: Without dead ends: 54 [2022-03-20 14:11:57,505 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-03-20 14:11:57,513 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 45 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 14:11:57,514 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 198 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 14:11:57,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-03-20 14:11:57,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2022-03-20 14:11:57,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 18 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-20 14:11:57,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 67 transitions. [2022-03-20 14:11:57,533 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 67 transitions. Word has length 33 [2022-03-20 14:11:57,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:11:57,534 INFO L478 AbstractCegarLoop]: Abstraction has 53 states and 67 transitions. [2022-03-20 14:11:57,534 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-20 14:11:57,534 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 67 transitions. [2022-03-20 14:11:57,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-20 14:11:57,534 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:11:57,535 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:11:57,554 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 14:11:57,739 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 14:11:57,740 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:11:57,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:11:57,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1297647068, now seen corresponding path program 1 times [2022-03-20 14:11:57,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:11:57,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1256105893] [2022-03-20 14:11:57,741 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:11:57,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1297647068, now seen corresponding path program 2 times [2022-03-20 14:11:57,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:11:57,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000935811] [2022-03-20 14:11:57,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:11:57,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:11:57,751 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:11:57,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [366460366] [2022-03-20 14:11:57,751 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:11:57,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:11:57,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:11:57,752 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 14:11:57,753 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 14:11:57,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 14:11:57,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:11:57,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 14:11:57,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:11:57,849 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-20 14:11:57,849 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 14:11:57,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:11:57,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000935811] [2022-03-20 14:11:57,852 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:11:57,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366460366] [2022-03-20 14:11:57,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366460366] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:11:57,853 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:11:57,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 14:11:57,854 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:11:57,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1256105893] [2022-03-20 14:11:57,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1256105893] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:11:57,857 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:11:57,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 14:11:57,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82497264] [2022-03-20 14:11:57,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:11:57,857 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 14:11:57,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:11:57,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 14:11:57,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 14:11:57,858 INFO L87 Difference]: Start difference. First operand 53 states and 67 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, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-03-20 14:11:57,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:11:57,905 INFO L93 Difference]: Finished difference Result 79 states and 105 transitions. [2022-03-20 14:11:57,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 14:11:57,906 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, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 40 [2022-03-20 14:11:57,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:11:57,907 INFO L225 Difference]: With dead ends: 79 [2022-03-20 14:11:57,907 INFO L226 Difference]: Without dead ends: 77 [2022-03-20 14:11:57,907 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 36 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 14:11:57,907 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 10 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 14:11:57,908 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 160 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 14:11:57,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-03-20 14:11:57,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 70. [2022-03-20 14:11:57,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 40 states have internal predecessors, (44), 25 states have call successors, (25), 7 states have call predecessors, (25), 6 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2022-03-20 14:11:57,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 92 transitions. [2022-03-20 14:11:57,918 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 92 transitions. Word has length 40 [2022-03-20 14:11:57,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:11:57,918 INFO L478 AbstractCegarLoop]: Abstraction has 70 states and 92 transitions. [2022-03-20 14:11:57,918 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, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-03-20 14:11:57,918 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 92 transitions. [2022-03-20 14:11:57,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-20 14:11:57,919 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:11:57,919 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:11:57,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 14:11:58,127 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 14:11:58,127 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:11:58,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:11:58,128 INFO L85 PathProgramCache]: Analyzing trace with hash -391974204, now seen corresponding path program 1 times [2022-03-20 14:11:58,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:11:58,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1219787456] [2022-03-20 14:11:58,128 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:11:58,128 INFO L85 PathProgramCache]: Analyzing trace with hash -391974204, now seen corresponding path program 2 times [2022-03-20 14:11:58,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:11:58,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37303513] [2022-03-20 14:11:58,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:11:58,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:11:58,139 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:11:58,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1698487454] [2022-03-20 14:11:58,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:11:58,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:11:58,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:11:58,141 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 14:11:58,142 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 14:11:58,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 14:11:58,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:11:58,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 14:11:58,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:11:58,266 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-20 14:11:58,266 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 14:11:58,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:11:58,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37303513] [2022-03-20 14:11:58,266 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:11:58,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698487454] [2022-03-20 14:11:58,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698487454] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:11:58,266 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:11:58,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 14:11:58,267 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:11:58,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1219787456] [2022-03-20 14:11:58,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1219787456] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:11:58,267 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:11:58,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 14:11:58,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411320140] [2022-03-20 14:11:58,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:11:58,267 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 14:11:58,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:11:58,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 14:11:58,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-03-20 14:11:58,268 INFO L87 Difference]: Start difference. First operand 70 states and 92 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-20 14:11:58,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:11:58,342 INFO L93 Difference]: Finished difference Result 76 states and 97 transitions. [2022-03-20 14:11:58,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 14:11:58,343 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 50 [2022-03-20 14:11:58,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:11:58,344 INFO L225 Difference]: With dead ends: 76 [2022-03-20 14:11:58,344 INFO L226 Difference]: Without dead ends: 74 [2022-03-20 14:11:58,345 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-03-20 14:11:58,345 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 16 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 14:11:58,345 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 197 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 14:11:58,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-03-20 14:11:58,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2022-03-20 14:11:58,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 41 states have (on average 1.146341463414634) internal successors, (47), 43 states have internal predecessors, (47), 25 states have call successors, (25), 8 states have call predecessors, (25), 7 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2022-03-20 14:11:58,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 95 transitions. [2022-03-20 14:11:58,355 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 95 transitions. Word has length 50 [2022-03-20 14:11:58,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:11:58,355 INFO L478 AbstractCegarLoop]: Abstraction has 74 states and 95 transitions. [2022-03-20 14:11:58,355 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-20 14:11:58,356 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 95 transitions. [2022-03-20 14:11:58,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-20 14:11:58,356 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:11:58,356 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:11:58,375 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 14:11:58,572 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 14:11:58,573 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:11:58,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:11:58,573 INFO L85 PathProgramCache]: Analyzing trace with hash 991781023, now seen corresponding path program 1 times [2022-03-20 14:11:58,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:11:58,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [435892461] [2022-03-20 14:11:58,573 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:11:58,574 INFO L85 PathProgramCache]: Analyzing trace with hash 991781023, now seen corresponding path program 2 times [2022-03-20 14:11:58,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:11:58,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131367398] [2022-03-20 14:11:58,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:11:58,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:11:58,583 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:11:58,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [893255143] [2022-03-20 14:11:58,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:11:58,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:11:58,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:11:58,584 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 14:11:58,585 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 14:11:58,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 14:11:58,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:11:58,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 14:11:58,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:11:58,742 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-20 14:11:58,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:11:58,892 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-20 14:11:58,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:11:58,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131367398] [2022-03-20 14:11:58,892 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:11:58,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893255143] [2022-03-20 14:11:58,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893255143] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:11:58,892 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:11:58,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-03-20 14:11:58,893 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:11:58,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [435892461] [2022-03-20 14:11:58,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [435892461] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:11:58,893 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:11:58,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 14:11:58,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643474605] [2022-03-20 14:11:58,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:11:58,893 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 14:11:58,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:11:58,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 14:11:58,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-03-20 14:11:58,894 INFO L87 Difference]: Start difference. First operand 74 states and 95 transitions. Second operand has 8 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-20 14:11:58,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:11:58,968 INFO L93 Difference]: Finished difference Result 80 states and 100 transitions. [2022-03-20 14:11:58,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 14:11:58,968 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 56 [2022-03-20 14:11:58,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:11:58,969 INFO L225 Difference]: With dead ends: 80 [2022-03-20 14:11:58,969 INFO L226 Difference]: Without dead ends: 78 [2022-03-20 14:11:58,969 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-03-20 14:11:58,970 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 18 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 14:11:58,970 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 144 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 14:11:58,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-03-20 14:11:58,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2022-03-20 14:11:58,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 46 states have internal predecessors, (50), 25 states have call successors, (25), 9 states have call predecessors, (25), 8 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2022-03-20 14:11:58,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 98 transitions. [2022-03-20 14:11:58,989 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 98 transitions. Word has length 56 [2022-03-20 14:11:58,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:11:58,989 INFO L478 AbstractCegarLoop]: Abstraction has 78 states and 98 transitions. [2022-03-20 14:11:58,990 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-20 14:11:58,990 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 98 transitions. [2022-03-20 14:11:58,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-20 14:11:58,990 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:11:58,991 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:11:59,007 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 14:11:59,203 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 14:11:59,203 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:11:59,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:11:59,204 INFO L85 PathProgramCache]: Analyzing trace with hash -2096667334, now seen corresponding path program 1 times [2022-03-20 14:11:59,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:11:59,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1769313043] [2022-03-20 14:11:59,204 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:11:59,204 INFO L85 PathProgramCache]: Analyzing trace with hash -2096667334, now seen corresponding path program 2 times [2022-03-20 14:11:59,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:11:59,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591452714] [2022-03-20 14:11:59,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:11:59,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:11:59,212 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:11:59,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [74276856] [2022-03-20 14:11:59,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:11:59,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:11:59,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:11:59,213 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 14:11:59,215 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 14:11:59,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 14:11:59,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:11:59,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-20 14:11:59,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:11:59,398 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-03-20 14:11:59,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:11:59,507 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-03-20 14:11:59,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:11:59,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591452714] [2022-03-20 14:11:59,507 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:11:59,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74276856] [2022-03-20 14:11:59,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74276856] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:11:59,507 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:11:59,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-03-20 14:11:59,508 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:11:59,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1769313043] [2022-03-20 14:11:59,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1769313043] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:11:59,508 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:11:59,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 14:11:59,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596226051] [2022-03-20 14:11:59,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:11:59,508 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 14:11:59,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:11:59,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 14:11:59,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-03-20 14:11:59,509 INFO L87 Difference]: Start difference. First operand 78 states and 98 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-03-20 14:11:59,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:11:59,596 INFO L93 Difference]: Finished difference Result 111 states and 142 transitions. [2022-03-20 14:11:59,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 14:11:59,603 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 63 [2022-03-20 14:11:59,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:11:59,606 INFO L225 Difference]: With dead ends: 111 [2022-03-20 14:11:59,606 INFO L226 Difference]: Without dead ends: 108 [2022-03-20 14:11:59,606 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 116 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-03-20 14:11:59,607 INFO L913 BasicCegarLoop]: 57 mSDtfsCounter, 19 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 14:11:59,607 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 279 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 14:11:59,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-03-20 14:11:59,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 103. [2022-03-20 14:11:59,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 58 states have (on average 1.1379310344827587) internal successors, (66), 60 states have internal predecessors, (66), 34 states have call successors, (34), 11 states have call predecessors, (34), 10 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) [2022-03-20 14:11:59,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 132 transitions. [2022-03-20 14:11:59,634 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 132 transitions. Word has length 63 [2022-03-20 14:11:59,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:11:59,635 INFO L478 AbstractCegarLoop]: Abstraction has 103 states and 132 transitions. [2022-03-20 14:11:59,635 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-03-20 14:11:59,635 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 132 transitions. [2022-03-20 14:11:59,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-03-20 14:11:59,636 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:11:59,636 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:11:59,654 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 14:11:59,836 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 14:11:59,837 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:11:59,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:11:59,837 INFO L85 PathProgramCache]: Analyzing trace with hash -2105983492, now seen corresponding path program 1 times [2022-03-20 14:11:59,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:11:59,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1096815965] [2022-03-20 14:11:59,837 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:11:59,838 INFO L85 PathProgramCache]: Analyzing trace with hash -2105983492, now seen corresponding path program 2 times [2022-03-20 14:11:59,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:11:59,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930828416] [2022-03-20 14:11:59,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:11:59,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:11:59,845 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:11:59,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1757375886] [2022-03-20 14:11:59,846 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:11:59,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:11:59,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:11:59,847 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 14:11:59,851 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 14:11:59,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 14:11:59,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:11:59,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-20 14:11:59,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:12:00,267 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 54 proven. 22 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-03-20 14:12:00,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:12:01,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:12:01,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930828416] [2022-03-20 14:12:01,004 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:12:01,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757375886] [2022-03-20 14:12:01,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757375886] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 14:12:01,004 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 14:12:01,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-03-20 14:12:01,004 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:12:01,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1096815965] [2022-03-20 14:12:01,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1096815965] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:12:01,004 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:12:01,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 14:12:01,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807527383] [2022-03-20 14:12:01,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:12:01,005 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 14:12:01,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:12:01,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 14:12:01,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=283, Unknown=1, NotChecked=0, Total=380 [2022-03-20 14:12:01,006 INFO L87 Difference]: Start difference. First operand 103 states and 132 transitions. Second operand has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2022-03-20 14:12:01,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:12:01,283 INFO L93 Difference]: Finished difference Result 147 states and 191 transitions. [2022-03-20 14:12:01,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 14:12:01,283 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) Word has length 86 [2022-03-20 14:12:01,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:12:01,286 INFO L225 Difference]: With dead ends: 147 [2022-03-20 14:12:01,286 INFO L226 Difference]: Without dead ends: 144 [2022-03-20 14:12:01,287 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 118 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=109, Invalid=352, Unknown=1, NotChecked=0, Total=462 [2022-03-20 14:12:01,287 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 29 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 14:12:01,287 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 295 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 363 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 14:12:01,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-03-20 14:12:01,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 121. [2022-03-20 14:12:01,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 69 states have (on average 1.1304347826086956) internal successors, (78), 72 states have internal predecessors, (78), 39 states have call successors, (39), 13 states have call predecessors, (39), 12 states have return successors, (37), 35 states have call predecessors, (37), 37 states have call successors, (37) [2022-03-20 14:12:01,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 154 transitions. [2022-03-20 14:12:01,311 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 154 transitions. Word has length 86 [2022-03-20 14:12:01,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:12:01,311 INFO L478 AbstractCegarLoop]: Abstraction has 121 states and 154 transitions. [2022-03-20 14:12:01,311 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2022-03-20 14:12:01,311 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 154 transitions. [2022-03-20 14:12:01,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-03-20 14:12:01,315 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:12:01,315 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:12:01,333 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 14:12:01,531 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 14:12:01,532 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:12:01,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:12:01,532 INFO L85 PathProgramCache]: Analyzing trace with hash -895340852, now seen corresponding path program 3 times [2022-03-20 14:12:01,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:12:01,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2093679308] [2022-03-20 14:12:01,533 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:12:01,533 INFO L85 PathProgramCache]: Analyzing trace with hash -895340852, now seen corresponding path program 4 times [2022-03-20 14:12:01,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:12:01,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113739008] [2022-03-20 14:12:01,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:12:01,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:12:01,546 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:12:01,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [976728659] [2022-03-20 14:12:01,546 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 14:12:01,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:12:01,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:12:01,547 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 14:12:01,548 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 14:12:01,582 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 14:12:01,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:12:01,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 14:12:01,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:12:01,700 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 142 proven. 0 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2022-03-20 14:12:01,701 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 14:12:01,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:12:01,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113739008] [2022-03-20 14:12:01,701 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:12:01,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976728659] [2022-03-20 14:12:01,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976728659] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:12:01,701 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:12:01,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 14:12:01,703 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:12:01,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2093679308] [2022-03-20 14:12:01,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2093679308] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:12:01,703 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:12:01,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 14:12:01,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875018494] [2022-03-20 14:12:01,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:12:01,704 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 14:12:01,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:12:01,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 14:12:01,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-20 14:12:01,704 INFO L87 Difference]: Start difference. First operand 121 states and 154 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 4 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2022-03-20 14:12:01,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:12:01,756 INFO L93 Difference]: Finished difference Result 185 states and 240 transitions. [2022-03-20 14:12:01,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 14:12:01,757 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 4 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 93 [2022-03-20 14:12:01,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:12:01,758 INFO L225 Difference]: With dead ends: 185 [2022-03-20 14:12:01,758 INFO L226 Difference]: Without dead ends: 125 [2022-03-20 14:12:01,760 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-20 14:12:01,761 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 4 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 14:12:01,762 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 161 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 14:12:01,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-03-20 14:12:01,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 120. [2022-03-20 14:12:01,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 68 states have (on average 1.1176470588235294) internal successors, (76), 69 states have internal predecessors, (76), 39 states have call successors, (39), 13 states have call predecessors, (39), 12 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2022-03-20 14:12:01,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 152 transitions. [2022-03-20 14:12:01,778 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 152 transitions. Word has length 93 [2022-03-20 14:12:01,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:12:01,780 INFO L478 AbstractCegarLoop]: Abstraction has 120 states and 152 transitions. [2022-03-20 14:12:01,780 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 4 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2022-03-20 14:12:01,780 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 152 transitions. [2022-03-20 14:12:01,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-03-20 14:12:01,785 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:12:01,785 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 14, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:12:01,804 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-20 14:12:01,999 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 14:12:01,999 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:12:02,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:12:02,000 INFO L85 PathProgramCache]: Analyzing trace with hash -39671046, now seen corresponding path program 3 times [2022-03-20 14:12:02,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:12:02,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1137400564] [2022-03-20 14:12:02,000 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:12:02,000 INFO L85 PathProgramCache]: Analyzing trace with hash -39671046, now seen corresponding path program 4 times [2022-03-20 14:12:02,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:12:02,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638765369] [2022-03-20 14:12:02,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:12:02,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:12:02,008 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:12:02,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [541621225] [2022-03-20 14:12:02,008 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 14:12:02,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:12:02,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:12:02,009 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 14:12:02,010 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 14:12:02,049 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 14:12:02,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:12:02,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-20 14:12:02,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:12:02,754 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 45 proven. 42 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2022-03-20 14:12:02,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:12:03,325 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 14:12:03,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:12:03,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638765369] [2022-03-20 14:12:03,397 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:12:03,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541621225] [2022-03-20 14:12:03,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541621225] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 14:12:03,397 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 14:12:03,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-03-20 14:12:03,397 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:12:03,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1137400564] [2022-03-20 14:12:03,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1137400564] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:12:03,398 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:12:03,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 14:12:03,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265623472] [2022-03-20 14:12:03,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:12:03,398 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 14:12:03,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:12:03,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 14:12:03,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2022-03-20 14:12:03,399 INFO L87 Difference]: Start difference. First operand 120 states and 152 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 12 states have internal predecessors, (29), 8 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 8 states have call successors, (18) [2022-03-20 14:12:04,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:12:04,130 INFO L93 Difference]: Finished difference Result 164 states and 211 transitions. [2022-03-20 14:12:04,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 14:12:04,130 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 12 states have internal predecessors, (29), 8 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 8 states have call successors, (18) Word has length 109 [2022-03-20 14:12:04,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:12:04,131 INFO L225 Difference]: With dead ends: 164 [2022-03-20 14:12:04,131 INFO L226 Difference]: Without dead ends: 161 [2022-03-20 14:12:04,132 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 162 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2022-03-20 14:12:04,132 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 29 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 14:12:04,132 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 458 Invalid, 582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 548 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 14:12:04,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-03-20 14:12:04,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 156. [2022-03-20 14:12:04,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 88 states have (on average 1.125) internal successors, (99), 89 states have internal predecessors, (99), 52 states have call successors, (52), 16 states have call predecessors, (52), 15 states have return successors, (50), 50 states have call predecessors, (50), 50 states have call successors, (50) [2022-03-20 14:12:04,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 201 transitions. [2022-03-20 14:12:04,147 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 201 transitions. Word has length 109 [2022-03-20 14:12:04,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:12:04,148 INFO L478 AbstractCegarLoop]: Abstraction has 156 states and 201 transitions. [2022-03-20 14:12:04,148 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 12 states have internal predecessors, (29), 8 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 8 states have call successors, (18) [2022-03-20 14:12:04,148 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 201 transitions. [2022-03-20 14:12:04,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-03-20 14:12:04,148 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:12:04,148 INFO L499 BasicCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:12:04,165 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 14:12:04,364 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 14:12:04,364 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:12:04,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:12:04,365 INFO L85 PathProgramCache]: Analyzing trace with hash 800180238, now seen corresponding path program 5 times [2022-03-20 14:12:04,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:12:04,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1660434456] [2022-03-20 14:12:04,365 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:12:04,365 INFO L85 PathProgramCache]: Analyzing trace with hash 800180238, now seen corresponding path program 6 times [2022-03-20 14:12:04,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:12:04,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518289709] [2022-03-20 14:12:04,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:12:04,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:12:04,372 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:12:04,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2089866453] [2022-03-20 14:12:04,373 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 14:12:04,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:12:04,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:12:04,374 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 14:12:04,403 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 14:12:04,422 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 14:12:04,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:12:04,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-20 14:12:04,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:12:04,612 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 114 proven. 5 refuted. 0 times theorem prover too weak. 369 trivial. 0 not checked. [2022-03-20 14:12:04,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:12:04,819 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 114 proven. 5 refuted. 0 times theorem prover too weak. 369 trivial. 0 not checked. [2022-03-20 14:12:04,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:12:04,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518289709] [2022-03-20 14:12:04,819 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:12:04,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089866453] [2022-03-20 14:12:04,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089866453] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:12:04,820 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:12:04,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-03-20 14:12:04,820 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:12:04,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1660434456] [2022-03-20 14:12:04,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1660434456] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:12:04,820 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:12:04,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 14:12:04,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56928778] [2022-03-20 14:12:04,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:12:04,820 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 14:12:04,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:12:04,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 14:12:04,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-03-20 14:12:04,821 INFO L87 Difference]: Start difference. First operand 156 states and 201 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2022-03-20 14:12:04,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:12:04,907 INFO L93 Difference]: Finished difference Result 164 states and 207 transitions. [2022-03-20 14:12:04,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 14:12:04,907 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) Word has length 116 [2022-03-20 14:12:04,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:12:04,907 INFO L225 Difference]: With dead ends: 164 [2022-03-20 14:12:04,907 INFO L226 Difference]: Without dead ends: 0 [2022-03-20 14:12:04,908 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 221 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-03-20 14:12:04,908 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 18 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 14:12:04,909 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 137 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 14:12:04,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-20 14:12:04,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-20 14:12:04,909 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 14:12:04,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-20 14:12:04,909 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 116 [2022-03-20 14:12:04,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:12:04,909 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-20 14:12:04,909 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2022-03-20 14:12:04,909 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-20 14:12:04,909 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-20 14:12:04,911 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-20 14:12:04,928 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 14:12:05,127 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 14:12:05,129 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-20 14:12:07,495 INFO L882 garLoopResultBuilder]: For program point reach_errorEXIT(line 8) no Hoare annotation was computed. [2022-03-20 14:12:07,496 INFO L882 garLoopResultBuilder]: For program point reach_errorENTRY(line 8) no Hoare annotation was computed. [2022-03-20 14:12:07,496 INFO L882 garLoopResultBuilder]: For program point reach_errorFINAL(line 8) no Hoare annotation was computed. [2022-03-20 14:12:07,496 INFO L885 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 11 13) the Hoare annotation is: true [2022-03-20 14:12:07,496 INFO L878 garLoopResultBuilder]: At program point L12(line 12) the Hoare annotation is: (= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|) [2022-03-20 14:12:07,496 INFO L878 garLoopResultBuilder]: At program point L12-2(lines 11 13) the Hoare annotation is: (and (not (= |assume_abort_if_not_#in~cond| 0)) (= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|)) [2022-03-20 14:12:07,496 INFO L878 garLoopResultBuilder]: At program point assume_abort_if_notEXIT(lines 11 13) the Hoare annotation is: (and (not (= |assume_abort_if_not_#in~cond| 0)) (= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|)) [2022-03-20 14:12:07,496 INFO L885 garLoopResultBuilder]: At program point L64(line 64) the Hoare annotation is: true [2022-03-20 14:12:07,496 INFO L878 garLoopResultBuilder]: At program point L31(line 31) the Hoare annotation is: (and (<= main_~y~0 100) (<= 1 main_~y~0)) [2022-03-20 14:12:07,496 INFO L885 garLoopResultBuilder]: At program point L29(line 29) the Hoare annotation is: true [2022-03-20 14:12:07,496 INFO L878 garLoopResultBuilder]: At program point L29-1(line 29) the Hoare annotation is: (and (<= 0 main_~y~0) (<= main_~y~0 100)) [2022-03-20 14:12:07,496 INFO L885 garLoopResultBuilder]: At program point L27(line 27) the Hoare annotation is: true [2022-03-20 14:12:07,496 INFO L885 garLoopResultBuilder]: At program point L27-1(line 27) the Hoare annotation is: true [2022-03-20 14:12:07,496 INFO L885 garLoopResultBuilder]: At program point mainEXIT(lines 22 66) the Hoare annotation is: true [2022-03-20 14:12:07,496 INFO L878 garLoopResultBuilder]: At program point L50(lines 47 59) the Hoare annotation is: (let ((.cse0 (* main_~a~0 main_~y~0))) (and (= (+ (* main_~q~0 main_~y~0) main_~b~0 main_~r~0) (+ main_~x~0 .cse0)) (<= 1 main_~r~0) (<= main_~y~0 100) (<= 1 main_~y~0) (= main_~b~0 .cse0))) [2022-03-20 14:12:07,497 INFO L878 garLoopResultBuilder]: At program point L48(line 48) the Hoare annotation is: (let ((.cse0 (* main_~a~0 main_~y~0))) (and (= (+ (* main_~q~0 main_~y~0) main_~b~0 main_~r~0) (+ main_~x~0 .cse0)) (<= 1 main_~r~0) (<= main_~y~0 100) (<= 1 main_~y~0) (= main_~b~0 .cse0))) [2022-03-20 14:12:07,497 INFO L878 garLoopResultBuilder]: At program point L48-1(line 48) the Hoare annotation is: (let ((.cse0 (* main_~a~0 main_~y~0))) (and (= (+ (* main_~q~0 main_~y~0) main_~b~0 main_~r~0) (+ main_~x~0 .cse0)) (<= 1 main_~r~0) (<= main_~y~0 100) (<= 1 main_~y~0) (= main_~b~0 .cse0))) [2022-03-20 14:12:07,497 INFO L885 garLoopResultBuilder]: At program point mainFINAL(lines 22 66) the Hoare annotation is: true [2022-03-20 14:12:07,497 INFO L878 garLoopResultBuilder]: At program point L40(lines 38 62) the Hoare annotation is: (let ((.cse0 (* main_~a~0 main_~y~0))) (and (= (+ (* main_~q~0 main_~y~0) main_~b~0 main_~r~0) (+ main_~x~0 .cse0)) (<= main_~y~0 100) (<= 1 main_~y~0) (= main_~b~0 .cse0))) [2022-03-20 14:12:07,497 INFO L878 garLoopResultBuilder]: At program point L38-2(lines 38 62) the Hoare annotation is: (let ((.cse0 (* main_~a~0 main_~y~0))) (and (= (+ (* main_~q~0 main_~y~0) main_~b~0 main_~r~0) (+ main_~x~0 .cse0)) (<= main_~y~0 100) (<= 1 main_~y~0) (= main_~b~0 .cse0))) [2022-03-20 14:12:07,497 INFO L878 garLoopResultBuilder]: At program point L38-3(lines 38 62) the Hoare annotation is: (let ((.cse2 (* main_~a~0 main_~y~0))) (let ((.cse1 (= main_~b~0 .cse2)) (.cse0 (<= main_~y~0 100)) (.cse3 (<= 1 main_~y~0))) (or (and (< main_~x~0 (* main_~b~0 2)) (= main_~x~0 (+ main_~b~0 main_~r~0)) (= main_~a~0 main_~q~0) .cse0 (= main_~a~0 2) .cse1 (<= main_~y~0 main_~x~0)) (and (< main_~r~0 main_~y~0) (= (+ (* main_~q~0 main_~y~0) main_~b~0 main_~r~0) (+ main_~x~0 .cse2)) .cse0 .cse3 .cse1) (and .cse0 (= main_~x~0 (+ main_~y~0 main_~r~0)) (= main_~q~0 1) .cse3 .cse1) (and (= main_~x~0 main_~r~0) .cse0 (= main_~q~0 0) .cse3)))) [2022-03-20 14:12:07,497 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 22 66) the Hoare annotation is: true [2022-03-20 14:12:07,497 INFO L878 garLoopResultBuilder]: At program point L55(line 55) the Hoare annotation is: (let ((.cse0 (* main_~a~0 main_~y~0))) (and (= (+ (* main_~q~0 main_~y~0) main_~b~0 main_~r~0) (+ main_~x~0 .cse0)) (<= (* 2 .cse0) main_~r~0) (<= 1 main_~r~0) (<= main_~y~0 100) (<= 1 main_~y~0) (= main_~b~0 .cse0))) [2022-03-20 14:12:07,497 INFO L878 garLoopResultBuilder]: At program point L55-1(line 55) the Hoare annotation is: (let ((.cse0 (* main_~a~0 main_~y~0))) (and (= (+ (* main_~q~0 main_~y~0) main_~b~0 main_~r~0) (+ main_~x~0 .cse0)) (<= (* 2 .cse0) main_~r~0) (<= 1 main_~r~0) (<= main_~y~0 100) (<= 1 main_~y~0) (= main_~b~0 .cse0))) [2022-03-20 14:12:07,497 INFO L878 garLoopResultBuilder]: At program point L49(line 49) the Hoare annotation is: (let ((.cse0 (* main_~a~0 main_~y~0))) (and (= (+ (* main_~q~0 main_~y~0) main_~b~0 main_~r~0) (+ main_~x~0 .cse0)) (<= 1 main_~r~0) (<= main_~y~0 100) (<= 1 main_~y~0) (= main_~b~0 .cse0))) [2022-03-20 14:12:07,497 INFO L878 garLoopResultBuilder]: At program point L47-2(lines 47 59) the Hoare annotation is: (let ((.cse0 (* main_~a~0 main_~y~0))) (and (= (+ (* main_~q~0 main_~y~0) main_~b~0 main_~r~0) (+ main_~x~0 .cse0)) (<= 1 main_~r~0) (<= main_~y~0 100) (<= 1 main_~y~0) (= main_~b~0 .cse0))) [2022-03-20 14:12:07,497 INFO L878 garLoopResultBuilder]: At program point L47-3(lines 47 59) the Hoare annotation is: (let ((.cse0 (* main_~a~0 main_~y~0))) (and (= (+ (* main_~q~0 main_~y~0) main_~b~0 main_~r~0) (+ main_~x~0 .cse0)) (<= 1 main_~r~0) (<= main_~y~0 100) (<= 1 main_~y~0) (= main_~b~0 .cse0))) [2022-03-20 14:12:07,497 INFO L878 garLoopResultBuilder]: At program point L39(line 39) the Hoare annotation is: (let ((.cse0 (* main_~a~0 main_~y~0))) (and (= (+ (* main_~q~0 main_~y~0) main_~b~0 main_~r~0) (+ main_~x~0 .cse0)) (<= main_~y~0 100) (<= 1 main_~y~0) (= main_~b~0 .cse0))) [2022-03-20 14:12:07,497 INFO L878 garLoopResultBuilder]: At program point L39-1(line 39) the Hoare annotation is: (let ((.cse0 (* main_~a~0 main_~y~0))) (and (= (+ (* main_~q~0 main_~y~0) main_~b~0 main_~r~0) (+ main_~x~0 .cse0)) (<= main_~y~0 100) (<= 1 main_~y~0) (= main_~b~0 .cse0))) [2022-03-20 14:12:07,497 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2022-03-20 14:12:07,497 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-03-20 14:12:07,498 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2022-03-20 14:12:07,498 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2022-03-20 14:12:07,498 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-03-20 14:12:07,498 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-03-20 14:12:07,498 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2022-03-20 14:12:07,498 INFO L878 garLoopResultBuilder]: At program point L16(lines 16 17) the Hoare annotation is: (not (<= 1 |__VERIFIER_assert_#in~cond|)) [2022-03-20 14:12:07,498 INFO L878 garLoopResultBuilder]: At program point L15(lines 15 18) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (not (<= 1 |__VERIFIER_assert_#in~cond|))) [2022-03-20 14:12:07,498 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 14 20) the Hoare annotation is: true [2022-03-20 14:12:07,498 INFO L878 garLoopResultBuilder]: At program point L15-2(lines 14 20) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (not (<= 1 |__VERIFIER_assert_#in~cond|))) [2022-03-20 14:12:07,498 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertEXIT(lines 14 20) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (not (<= 1 |__VERIFIER_assert_#in~cond|))) [2022-03-20 14:12:07,498 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) the Hoare annotation is: (not (<= 1 |__VERIFIER_assert_#in~cond|)) [2022-03-20 14:12:07,500 INFO L719 BasicCegarLoop]: Path program histogram: [6, 4, 2, 2, 2, 2, 2, 2] [2022-03-20 14:12:07,501 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-20 14:12:07,513 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 02:12:07 BoogieIcfgContainer [2022-03-20 14:12:07,513 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-20 14:12:07,514 INFO L158 Benchmark]: Toolchain (without parser) took 11690.33ms. Allocated memory was 194.0MB in the beginning and 232.8MB in the end (delta: 38.8MB). Free memory was 145.2MB in the beginning and 77.6MB in the end (delta: 67.6MB). Peak memory consumption was 110.1MB. Max. memory is 8.0GB. [2022-03-20 14:12:07,514 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 194.0MB. Free memory was 161.5MB in the beginning and 161.4MB in the end (delta: 151.8kB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-20 14:12:07,515 INFO L158 Benchmark]: CACSL2BoogieTranslator took 142.21ms. Allocated memory is still 194.0MB. Free memory was 144.9MB in the beginning and 169.8MB in the end (delta: -24.9MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-03-20 14:12:07,515 INFO L158 Benchmark]: Boogie Preprocessor took 25.69ms. Allocated memory is still 194.0MB. Free memory was 169.8MB in the beginning and 168.3MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-20 14:12:07,515 INFO L158 Benchmark]: RCFGBuilder took 178.08ms. Allocated memory is still 194.0MB. Free memory was 168.3MB in the beginning and 157.8MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-03-20 14:12:07,516 INFO L158 Benchmark]: TraceAbstraction took 11338.22ms. Allocated memory was 194.0MB in the beginning and 232.8MB in the end (delta: 38.8MB). Free memory was 157.4MB in the beginning and 77.6MB in the end (delta: 79.8MB). Peak memory consumption was 122.0MB. Max. memory is 8.0GB. [2022-03-20 14:12:07,517 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 194.0MB. Free memory was 161.5MB in the beginning and 161.4MB in the end (delta: 151.8kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 142.21ms. Allocated memory is still 194.0MB. Free memory was 144.9MB in the beginning and 169.8MB in the end (delta: -24.9MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 25.69ms. Allocated memory is still 194.0MB. Free memory was 169.8MB in the beginning and 168.3MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 178.08ms. Allocated memory is still 194.0MB. Free memory was 168.3MB in the beginning and 157.8MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 11338.22ms. Allocated memory was 194.0MB in the beginning and 232.8MB in the end (delta: 38.8MB). Free memory was 157.4MB in the beginning and 77.6MB in the end (delta: 79.8MB). Peak memory consumption was 122.0MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 42 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 11.3s, OverallIterations: 11, TraceHistogramMax: 16, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 1.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 2.4s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 281 SdHoareTripleChecker+Valid, 1.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 215 mSDsluCounter, 2223 SdHoareTripleChecker+Invalid, 1.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1770 mSDsCounter, 156 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1509 IncrementalHoareTripleChecker+Invalid, 1665 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 156 mSolverCounterUnsat, 453 mSDtfsCounter, 1509 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1062 GetRequests, 949 SyntacticMatches, 9 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=156occurred in iteration=10, InterpolantAutomatonStates: 85, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 11 MinimizatonAttempts, 49 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 39 LocationsWithAnnotation, 517 PreInvPairs, 756 NumberOfFragments, 502 HoareAnnotationTreeSize, 517 FomulaSimplifications, 426 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 39 FomulaSimplificationsInter, 10177 FormulaSimplificationTreeSizeReductionInter, 2.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 47]: Loop Invariant Derived loop invariant: (((q * y + b + r == x + a * y && 1 <= r) && y <= 100) && 1 <= y) && b == a * y - InvariantResult [Line: 38]: Loop Invariant Derived loop invariant: ((q * y + b + r == x + a * y && y <= 100) && 1 <= y) && b == a * y - ProcedureContractResult [Line: 11]: Procedure Contract for assume_abort_if_not Derived contract for procedure assume_abort_if_not: !(\old(cond) == 0) && cond == \old(cond) - ProcedureContractResult [Line: 22]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 14]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: \old(cond) == cond || !(1 <= \old(cond)) RESULT: Ultimate proved your program to be correct! [2022-03-20 14:12:07,552 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...