/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/prod4br-ll_valuebound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 22:26:25,406 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 22:26:25,407 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 22:26:25,429 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 22:26:25,464 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 22:26:25,465 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 22:26:25,472 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 22:26:25,473 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-20 22:26:25,478 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 22:26:25,478 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 22:26:25,479 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 22:26:25,479 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 22:26:25,479 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 22:26:25,479 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 22:26:25,479 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 22:26:25,480 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 22:26:25,480 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 22:26:25,480 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 22:26:25,480 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 22:26:25,480 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 22:26:25,480 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 22:26:25,480 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 22:26:25,480 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 22:26:25,480 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 22:26:25,481 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 22:26:25,481 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-20 22:26:25,481 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-20 22:26:25,481 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-20 22:26:25,481 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 22:26:25,481 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-20 22:26:25,481 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 22:26:25,675 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 22:26:25,698 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 22:26:25,699 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 22:26:25,700 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 22:26:25,700 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 22:26:25,701 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/prod4br-ll_valuebound10.c [2022-03-20 22:26:25,759 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0862b686c/f36851dd83a74f58953f733ff8fbaccc/FLAGa697baa29 [2022-03-20 22:26:26,102 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 22:26:26,102 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prod4br-ll_valuebound10.c [2022-03-20 22:26:26,107 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0862b686c/f36851dd83a74f58953f733ff8fbaccc/FLAGa697baa29 [2022-03-20 22:26:26,118 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0862b686c/f36851dd83a74f58953f733ff8fbaccc [2022-03-20 22:26:26,119 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 22:26:26,121 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 22:26:26,125 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 22:26:26,125 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 22:26:26,128 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 22:26:26,129 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 10:26:26" (1/1) ... [2022-03-20 22:26:26,130 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47b76a7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:26:26, skipping insertion in model container [2022-03-20 22:26:26,130 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 10:26:26" (1/1) ... [2022-03-20 22:26:26,134 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 22:26:26,147 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 22:26:26,261 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/prod4br-ll_valuebound10.c[524,537] [2022-03-20 22:26:26,272 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 22:26:26,281 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 22:26:26,288 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/prod4br-ll_valuebound10.c[524,537] [2022-03-20 22:26:26,293 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 22:26:26,301 INFO L208 MainTranslator]: Completed translation [2022-03-20 22:26:26,301 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:26:26 WrapperNode [2022-03-20 22:26:26,301 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 22:26:26,302 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 22:26:26,302 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 22:26:26,302 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 22:26:26,308 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:26:26" (1/1) ... [2022-03-20 22:26:26,308 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:26:26" (1/1) ... [2022-03-20 22:26:26,312 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:26:26" (1/1) ... [2022-03-20 22:26:26,312 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:26:26" (1/1) ... [2022-03-20 22:26:26,315 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:26:26" (1/1) ... [2022-03-20 22:26:26,317 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:26:26" (1/1) ... [2022-03-20 22:26:26,318 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:26:26" (1/1) ... [2022-03-20 22:26:26,319 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 22:26:26,319 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 22:26:26,319 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 22:26:26,319 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 22:26:26,320 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:26:26" (1/1) ... [2022-03-20 22:26:26,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 22:26:26,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:26:26,373 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 22:26:26,415 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 22:26:26,428 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 22:26:26,428 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 22:26:26,428 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 22:26:26,428 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 22:26:26,429 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 22:26:26,429 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 22:26:26,429 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 22:26:26,429 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 22:26:26,429 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 22:26:26,429 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 22:26:26,429 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 22:26:26,430 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 22:26:26,430 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 22:26:26,430 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 22:26:26,431 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 22:26:26,432 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 22:26:26,432 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 22:26:26,432 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 22:26:26,432 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 22:26:26,432 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 22:26:26,480 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 22:26:26,482 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 22:26:26,607 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 22:26:26,613 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 22:26:26,613 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-20 22:26:26,614 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 10:26:26 BoogieIcfgContainer [2022-03-20 22:26:26,614 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 22:26:26,615 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 22:26:26,615 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 22:26:26,618 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 22:26:26,618 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 10:26:26" (1/3) ... [2022-03-20 22:26:26,618 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1436e450 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 10:26:26, skipping insertion in model container [2022-03-20 22:26:26,618 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:26:26" (2/3) ... [2022-03-20 22:26:26,619 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1436e450 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 10:26:26, skipping insertion in model container [2022-03-20 22:26:26,619 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 10:26:26" (3/3) ... [2022-03-20 22:26:26,620 INFO L111 eAbstractionObserver]: Analyzing ICFG prod4br-ll_valuebound10.c [2022-03-20 22:26:26,623 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-20 22:26:26,623 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 22:26:26,651 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 22:26:26,655 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 22:26:26,655 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 22:26:26,665 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-20 22:26:26,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-20 22:26:26,670 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:26:26,671 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 22:26:26,671 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:26:26,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:26:26,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1738134960, now seen corresponding path program 1 times [2022-03-20 22:26:26,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:26:26,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1361552330] [2022-03-20 22:26:26,688 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:26:26,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1738134960, now seen corresponding path program 2 times [2022-03-20 22:26:26,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:26:26,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429653408] [2022-03-20 22:26:26,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:26:26,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:26:26,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 22:26:26,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 22:26:26,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 22:26:26,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 22:26:26,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 22:26:26,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 22:26:26,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 22:26:26,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-20 22:26:26,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 22:26:26,819 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 22:26:26,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:26:26,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429653408] [2022-03-20 22:26:26,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429653408] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:26:26,821 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:26:26,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 22:26:26,822 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:26:26,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1361552330] [2022-03-20 22:26:26,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1361552330] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:26:26,823 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:26:26,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 22:26:26,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194803080] [2022-03-20 22:26:26,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:26:26,826 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 22:26:26,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:26:26,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 22:26:26,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 22:26:26,845 INFO L87 Difference]: Start difference. First operand has 34 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) 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 22:26:26,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:26:26,893 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2022-03-20 22:26:26,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 22:26:26,895 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 22:26:26,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:26:26,900 INFO L225 Difference]: With dead ends: 61 [2022-03-20 22:26:26,900 INFO L226 Difference]: Without dead ends: 29 [2022-03-20 22:26:26,902 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 22:26:26,905 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 22 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 22:26:26,905 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 38 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 22:26:26,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-03-20 22:26:26,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-03-20 22:26:26,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 18 states have internal predecessors, (22), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-20 22:26:26,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2022-03-20 22:26:26,934 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 28 [2022-03-20 22:26:26,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:26:26,934 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2022-03-20 22:26:26,934 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 22:26:26,935 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2022-03-20 22:26:26,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-20 22:26:26,936 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:26:26,936 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 22:26:26,936 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 22:26:26,936 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:26:26,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:26:26,937 INFO L85 PathProgramCache]: Analyzing trace with hash 567203544, now seen corresponding path program 1 times [2022-03-20 22:26:26,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:26:26,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1277315824] [2022-03-20 22:26:26,938 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:26:26,938 INFO L85 PathProgramCache]: Analyzing trace with hash 567203544, now seen corresponding path program 2 times [2022-03-20 22:26:26,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:26:26,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688103349] [2022-03-20 22:26:26,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:26:26,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:26:26,976 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:26:26,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1043100028] [2022-03-20 22:26:26,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 22:26:26,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:26:26,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:26:27,004 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 22:26:27,005 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 22:26:27,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-20 22:26:27,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:26:27,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-20 22:26:27,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:26:27,246 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 22:26:27,246 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 22:26:27,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:26:27,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688103349] [2022-03-20 22:26:27,246 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:26:27,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043100028] [2022-03-20 22:26:27,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043100028] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:26:27,247 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:26:27,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 22:26:27,248 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:26:27,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1277315824] [2022-03-20 22:26:27,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1277315824] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:26:27,248 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:26:27,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 22:26:27,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404169860] [2022-03-20 22:26:27,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:26:27,249 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 22:26:27,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:26:27,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 22:26:27,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 22:26:27,250 INFO L87 Difference]: Start difference. First operand 29 states and 36 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 22:26:27,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:26:27,300 INFO L93 Difference]: Finished difference Result 43 states and 55 transitions. [2022-03-20 22:26:27,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 22:26:27,300 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 22:26:27,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:26:27,301 INFO L225 Difference]: With dead ends: 43 [2022-03-20 22:26:27,301 INFO L226 Difference]: Without dead ends: 41 [2022-03-20 22:26:27,302 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 22:26:27,302 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 9 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 22:26:27,303 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 101 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 22:26:27,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-03-20 22:26:27,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 35. [2022-03-20 22:26:27,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 23 states have internal predecessors, (26), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 22:26:27,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2022-03-20 22:26:27,311 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 28 [2022-03-20 22:26:27,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:26:27,312 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2022-03-20 22:26:27,312 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 22:26:27,312 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2022-03-20 22:26:27,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-20 22:26:27,313 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:26:27,313 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, 1] [2022-03-20 22:26:27,332 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 22:26:27,529 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 22:26:27,529 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:26:27,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:26:27,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1139707498, now seen corresponding path program 1 times [2022-03-20 22:26:27,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:26:27,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1358610268] [2022-03-20 22:26:27,531 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:26:27,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1139707498, now seen corresponding path program 2 times [2022-03-20 22:26:27,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:26:27,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836663397] [2022-03-20 22:26:27,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:26:27,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:26:27,554 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:26:27,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2136361502] [2022-03-20 22:26:27,554 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 22:26:27,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:26:27,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:26:27,563 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 22:26:27,565 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 22:26:27,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 22:26:27,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:26:27,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-20 22:26:27,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:26:28,016 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-20 22:26:28,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:26:28,247 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 22:26:28,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:26:28,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836663397] [2022-03-20 22:26:28,247 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:26:28,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136361502] [2022-03-20 22:26:28,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136361502] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 22:26:28,248 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 22:26:28,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 16 [2022-03-20 22:26:28,248 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:26:28,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1358610268] [2022-03-20 22:26:28,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1358610268] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:26:28,249 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:26:28,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 22:26:28,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150486043] [2022-03-20 22:26:28,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:26:28,249 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 22:26:28,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:26:28,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 22:26:28,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2022-03-20 22:26:28,252 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand has 13 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 10 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-20 22:26:28,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:26:28,807 INFO L93 Difference]: Finished difference Result 47 states and 58 transitions. [2022-03-20 22:26:28,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 22:26:28,808 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 10 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 34 [2022-03-20 22:26:28,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:26:28,809 INFO L225 Difference]: With dead ends: 47 [2022-03-20 22:26:28,809 INFO L226 Difference]: Without dead ends: 45 [2022-03-20 22:26:28,809 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-03-20 22:26:28,810 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 40 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 22:26:28,810 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 148 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 22:26:28,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-03-20 22:26:28,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 41. [2022-03-20 22:26:28,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 25 states have (on average 1.24) internal successors, (31), 27 states have internal predecessors, (31), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-20 22:26:28,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2022-03-20 22:26:28,825 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 34 [2022-03-20 22:26:28,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:26:28,825 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2022-03-20 22:26:28,825 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 10 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-20 22:26:28,825 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2022-03-20 22:26:28,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-20 22:26:28,826 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:26:28,826 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:26:28,846 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 22:26:29,027 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 22:26:29,027 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:26:29,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:26:29,028 INFO L85 PathProgramCache]: Analyzing trace with hash 412541489, now seen corresponding path program 1 times [2022-03-20 22:26:29,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:26:29,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1204867092] [2022-03-20 22:26:29,029 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:26:29,029 INFO L85 PathProgramCache]: Analyzing trace with hash 412541489, now seen corresponding path program 2 times [2022-03-20 22:26:29,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:26:29,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567699731] [2022-03-20 22:26:29,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:26:29,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:26:29,039 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:26:29,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [517420117] [2022-03-20 22:26:29,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 22:26:29,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:26:29,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:26:29,044 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 22:26:29,045 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 22:26:29,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 22:26:29,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:26:29,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-20 22:26:29,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:26:30,531 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-20 22:26:30,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:26:31,030 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-20 22:26:31,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:26:31,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567699731] [2022-03-20 22:26:31,031 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:26:31,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517420117] [2022-03-20 22:26:31,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517420117] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 22:26:31,032 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 22:26:31,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2022-03-20 22:26:31,032 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:26:31,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1204867092] [2022-03-20 22:26:31,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1204867092] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:26:31,033 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:26:31,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 22:26:31,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026737684] [2022-03-20 22:26:31,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:26:31,033 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 22:26:31,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:26:31,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 22:26:31,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-03-20 22:26:31,035 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 4 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 22:26:31,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:26:31,219 INFO L93 Difference]: Finished difference Result 59 states and 75 transitions. [2022-03-20 22:26:31,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 22:26:31,220 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 4 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 36 [2022-03-20 22:26:31,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:26:31,221 INFO L225 Difference]: With dead ends: 59 [2022-03-20 22:26:31,221 INFO L226 Difference]: Without dead ends: 57 [2022-03-20 22:26:31,221 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-03-20 22:26:31,222 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 50 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 22:26:31,222 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 140 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 22:26:31,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-03-20 22:26:31,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 48. [2022-03-20 22:26:31,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 33 states have internal predecessors, (37), 11 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 22:26:31,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2022-03-20 22:26:31,230 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 36 [2022-03-20 22:26:31,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:26:31,230 INFO L478 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2022-03-20 22:26:31,231 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 4 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 22:26:31,231 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2022-03-20 22:26:31,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-20 22:26:31,231 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:26:31,232 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:26:31,248 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 22:26:31,447 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 22:26:31,448 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:26:31,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:26:31,448 INFO L85 PathProgramCache]: Analyzing trace with hash 2032180221, now seen corresponding path program 1 times [2022-03-20 22:26:31,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:26:31,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2087676750] [2022-03-20 22:26:31,449 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:26:31,449 INFO L85 PathProgramCache]: Analyzing trace with hash 2032180221, now seen corresponding path program 2 times [2022-03-20 22:26:31,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:26:31,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214902659] [2022-03-20 22:26:31,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:26:31,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:26:31,459 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:26:31,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [710115834] [2022-03-20 22:26:31,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 22:26:31,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:26:31,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:26:31,461 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 22:26:31,462 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 22:26:31,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 22:26:31,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:26:31,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-20 22:26:31,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:26:31,646 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 22:26:31,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:26:31,886 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 22:26:31,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:26:31,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214902659] [2022-03-20 22:26:31,886 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:26:31,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710115834] [2022-03-20 22:26:31,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710115834] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 22:26:31,886 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 22:26:31,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2022-03-20 22:26:31,887 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:26:31,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2087676750] [2022-03-20 22:26:31,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2087676750] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:26:31,887 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:26:31,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 22:26:31,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552830482] [2022-03-20 22:26:31,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:26:31,887 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 22:26:31,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:26:31,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 22:26:31,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-03-20 22:26:31,888 INFO L87 Difference]: Start difference. First operand 48 states and 57 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 22:26:32,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:26:32,267 INFO L93 Difference]: Finished difference Result 77 states and 99 transitions. [2022-03-20 22:26:32,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 22:26:32,267 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 37 [2022-03-20 22:26:32,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:26:32,269 INFO L225 Difference]: With dead ends: 77 [2022-03-20 22:26:32,269 INFO L226 Difference]: Without dead ends: 63 [2022-03-20 22:26:32,269 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-03-20 22:26:32,270 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 17 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 22:26:32,270 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 161 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 22:26:32,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-03-20 22:26:32,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 59. [2022-03-20 22:26:32,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 42 states have internal predecessors, (50), 12 states have call successors, (12), 8 states have call predecessors, (12), 7 states have return successors, (10), 8 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 22:26:32,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 72 transitions. [2022-03-20 22:26:32,281 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 72 transitions. Word has length 37 [2022-03-20 22:26:32,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:26:32,281 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 72 transitions. [2022-03-20 22:26:32,281 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 22:26:32,281 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 72 transitions. [2022-03-20 22:26:32,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-20 22:26:32,282 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:26:32,282 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] [2022-03-20 22:26:32,308 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 22:26:32,499 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 22:26:32,500 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:26:32,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:26:32,500 INFO L85 PathProgramCache]: Analyzing trace with hash 262800198, now seen corresponding path program 1 times [2022-03-20 22:26:32,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:26:32,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1415553154] [2022-03-20 22:26:32,501 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:26:32,501 INFO L85 PathProgramCache]: Analyzing trace with hash 262800198, now seen corresponding path program 2 times [2022-03-20 22:26:32,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:26:32,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460026693] [2022-03-20 22:26:32,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:26:32,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:26:32,511 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:26:32,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1259802023] [2022-03-20 22:26:32,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 22:26:32,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:26:32,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:26:32,512 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 22:26:32,522 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 22:26:32,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 22:26:32,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:26:32,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-20 22:26:32,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:26:32,652 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 22:26:32,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:26:32,729 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 22:26:32,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:26:32,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460026693] [2022-03-20 22:26:32,730 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:26:32,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259802023] [2022-03-20 22:26:32,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259802023] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 22:26:32,730 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 22:26:32,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 11 [2022-03-20 22:26:32,730 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:26:32,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1415553154] [2022-03-20 22:26:32,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1415553154] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:26:32,730 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:26:32,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 22:26:32,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2277645] [2022-03-20 22:26:32,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:26:32,731 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 22:26:32,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:26:32,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 22:26:32,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-03-20 22:26:32,731 INFO L87 Difference]: Start difference. First operand 59 states and 72 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-20 22:26:32,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:26:32,825 INFO L93 Difference]: Finished difference Result 65 states and 77 transitions. [2022-03-20 22:26:32,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 22:26:32,826 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 39 [2022-03-20 22:26:32,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:26:32,826 INFO L225 Difference]: With dead ends: 65 [2022-03-20 22:26:32,826 INFO L226 Difference]: Without dead ends: 53 [2022-03-20 22:26:32,827 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-03-20 22:26:32,827 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 5 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 22:26:32,827 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 128 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 22:26:32,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-03-20 22:26:32,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-03-20 22:26:32,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 38 states have internal predecessors, (46), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-20 22:26:32,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 64 transitions. [2022-03-20 22:26:32,834 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 64 transitions. Word has length 39 [2022-03-20 22:26:32,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:26:32,835 INFO L478 AbstractCegarLoop]: Abstraction has 53 states and 64 transitions. [2022-03-20 22:26:32,835 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-20 22:26:32,835 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 64 transitions. [2022-03-20 22:26:32,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-20 22:26:32,835 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:26:32,836 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:26:32,855 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 22:26:33,052 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 22:26:33,053 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:26:33,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:26:33,053 INFO L85 PathProgramCache]: Analyzing trace with hash 844519116, now seen corresponding path program 1 times [2022-03-20 22:26:33,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:26:33,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1945868138] [2022-03-20 22:26:33,054 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:26:33,054 INFO L85 PathProgramCache]: Analyzing trace with hash 844519116, now seen corresponding path program 2 times [2022-03-20 22:26:33,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:26:33,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670547428] [2022-03-20 22:26:33,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:26:33,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:26:33,062 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:26:33,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [394144744] [2022-03-20 22:26:33,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 22:26:33,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:26:33,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:26:33,080 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 22:26:33,128 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 22:26:33,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 22:26:33,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:26:33,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-20 22:26:33,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:26:33,339 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-20 22:26:33,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:26:33,603 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 22:26:33,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:26:33,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670547428] [2022-03-20 22:26:33,604 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:26:33,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394144744] [2022-03-20 22:26:33,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394144744] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 22:26:33,604 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 22:26:33,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 15 [2022-03-20 22:26:33,604 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:26:33,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1945868138] [2022-03-20 22:26:33,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1945868138] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:26:33,605 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:26:33,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 22:26:33,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502028627] [2022-03-20 22:26:33,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:26:33,605 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 22:26:33,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:26:33,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 22:26:33,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-03-20 22:26:33,606 INFO L87 Difference]: Start difference. First operand 53 states and 64 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-20 22:26:33,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:26:33,855 INFO L93 Difference]: Finished difference Result 78 states and 99 transitions. [2022-03-20 22:26:33,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 22:26:33,856 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 38 [2022-03-20 22:26:33,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:26:33,857 INFO L225 Difference]: With dead ends: 78 [2022-03-20 22:26:33,857 INFO L226 Difference]: Without dead ends: 65 [2022-03-20 22:26:33,857 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2022-03-20 22:26:33,857 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 36 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 22:26:33,858 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 127 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 22:26:33,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-03-20 22:26:33,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 63. [2022-03-20 22:26:33,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 44 states have (on average 1.2954545454545454) internal successors, (57), 46 states have internal predecessors, (57), 11 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 22:26:33,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 77 transitions. [2022-03-20 22:26:33,867 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 77 transitions. Word has length 38 [2022-03-20 22:26:33,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:26:33,867 INFO L478 AbstractCegarLoop]: Abstraction has 63 states and 77 transitions. [2022-03-20 22:26:33,867 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-20 22:26:33,867 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 77 transitions. [2022-03-20 22:26:33,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-20 22:26:33,868 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:26:33,868 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:26:33,893 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 22:26:34,084 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 22:26:34,085 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:26:34,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:26:34,085 INFO L85 PathProgramCache]: Analyzing trace with hash 901777418, now seen corresponding path program 1 times [2022-03-20 22:26:34,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:26:34,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1432297816] [2022-03-20 22:26:34,086 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:26:34,086 INFO L85 PathProgramCache]: Analyzing trace with hash 901777418, now seen corresponding path program 2 times [2022-03-20 22:26:34,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:26:34,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015873591] [2022-03-20 22:26:34,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:26:34,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:26:34,096 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:26:34,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1510664382] [2022-03-20 22:26:34,097 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 22:26:34,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:26:34,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:26:34,102 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 22:26:34,114 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 22:26:34,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 22:26:34,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:26:34,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-20 22:26:34,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:26:34,275 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 22:26:34,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:26:34,355 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-03-20 22:26:34,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:26:34,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015873591] [2022-03-20 22:26:34,355 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:26:34,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510664382] [2022-03-20 22:26:34,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510664382] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 22:26:34,356 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 22:26:34,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-03-20 22:26:34,356 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:26:34,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1432297816] [2022-03-20 22:26:34,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1432297816] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:26:34,356 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:26:34,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 22:26:34,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304049975] [2022-03-20 22:26:34,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:26:34,357 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 22:26:34,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:26:34,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 22:26:34,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-20 22:26:34,358 INFO L87 Difference]: Start difference. First operand 63 states and 77 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 22:26:34,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:26:34,466 INFO L93 Difference]: Finished difference Result 69 states and 82 transitions. [2022-03-20 22:26:34,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 22:26:34,466 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 38 [2022-03-20 22:26:34,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:26:34,467 INFO L225 Difference]: With dead ends: 69 [2022-03-20 22:26:34,467 INFO L226 Difference]: Without dead ends: 65 [2022-03-20 22:26:34,467 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-20 22:26:34,467 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 6 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 22:26:34,468 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 86 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 22:26:34,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-03-20 22:26:34,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 59. [2022-03-20 22:26:34,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 42 states have (on average 1.2857142857142858) internal successors, (54), 42 states have internal predecessors, (54), 10 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-20 22:26:34,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 72 transitions. [2022-03-20 22:26:34,493 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 72 transitions. Word has length 38 [2022-03-20 22:26:34,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:26:34,493 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 72 transitions. [2022-03-20 22:26:34,493 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 22:26:34,494 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 72 transitions. [2022-03-20 22:26:34,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-20 22:26:34,495 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:26:34,495 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:26:34,515 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-03-20 22:26:34,715 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 22:26:34,715 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:26:34,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:26:34,716 INFO L85 PathProgramCache]: Analyzing trace with hash -982526417, now seen corresponding path program 1 times [2022-03-20 22:26:34,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:26:34,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1756518260] [2022-03-20 22:26:34,716 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:26:34,716 INFO L85 PathProgramCache]: Analyzing trace with hash -982526417, now seen corresponding path program 2 times [2022-03-20 22:26:34,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:26:34,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076326403] [2022-03-20 22:26:34,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:26:34,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:26:34,723 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:26:34,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1609591242] [2022-03-20 22:26:34,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 22:26:34,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:26:34,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:26:34,728 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 22:26:34,729 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 22:26:34,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 22:26:34,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:26:34,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-20 22:26:34,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:26:34,897 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 22:26:34,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:26:35,152 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 22:26:35,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:26:35,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076326403] [2022-03-20 22:26:35,152 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:26:35,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609591242] [2022-03-20 22:26:35,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609591242] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 22:26:35,153 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 22:26:35,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2022-03-20 22:26:35,153 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:26:35,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1756518260] [2022-03-20 22:26:35,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1756518260] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:26:35,153 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:26:35,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 22:26:35,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752402835] [2022-03-20 22:26:35,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:26:35,153 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 22:26:35,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:26:35,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 22:26:35,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-03-20 22:26:35,154 INFO L87 Difference]: Start difference. First operand 59 states and 72 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-20 22:26:35,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:26:35,233 INFO L93 Difference]: Finished difference Result 74 states and 93 transitions. [2022-03-20 22:26:35,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 22:26:35,234 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 42 [2022-03-20 22:26:35,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:26:35,235 INFO L225 Difference]: With dead ends: 74 [2022-03-20 22:26:35,235 INFO L226 Difference]: Without dead ends: 69 [2022-03-20 22:26:35,235 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2022-03-20 22:26:35,236 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 38 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 22:26:35,237 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 105 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 22:26:35,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-03-20 22:26:35,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2022-03-20 22:26:35,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 48 states have (on average 1.3125) internal successors, (63), 48 states have internal predecessors, (63), 12 states have call successors, (12), 8 states have call predecessors, (12), 6 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 22:26:35,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 85 transitions. [2022-03-20 22:26:35,262 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 85 transitions. Word has length 42 [2022-03-20 22:26:35,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:26:35,262 INFO L478 AbstractCegarLoop]: Abstraction has 67 states and 85 transitions. [2022-03-20 22:26:35,262 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-20 22:26:35,262 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 85 transitions. [2022-03-20 22:26:35,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-20 22:26:35,263 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:26:35,263 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:26:35,289 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 22:26:35,488 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 22:26:35,488 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:26:35,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:26:35,489 INFO L85 PathProgramCache]: Analyzing trace with hash 1669465851, now seen corresponding path program 1 times [2022-03-20 22:26:35,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:26:35,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [155084455] [2022-03-20 22:26:35,489 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:26:35,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1669465851, now seen corresponding path program 2 times [2022-03-20 22:26:35,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:26:35,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112370731] [2022-03-20 22:26:35,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:26:35,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:26:35,496 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:26:35,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1800712255] [2022-03-20 22:26:35,496 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 22:26:35,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:26:35,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:26:35,502 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 22:26:35,535 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 22:26:35,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 22:26:35,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:26:35,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-20 22:26:35,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:26:35,653 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 22:26:36,185 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-20 22:26:36,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:26:36,319 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-20 22:26:36,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:26:36,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112370731] [2022-03-20 22:26:36,320 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:26:36,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800712255] [2022-03-20 22:26:36,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800712255] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 22:26:36,320 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 22:26:36,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 15 [2022-03-20 22:26:36,320 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:26:36,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [155084455] [2022-03-20 22:26:36,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [155084455] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:26:36,320 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:26:36,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 22:26:36,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231774800] [2022-03-20 22:26:36,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:26:36,321 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 22:26:36,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:26:36,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 22:26:36,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-03-20 22:26:36,322 INFO L87 Difference]: Start difference. First operand 67 states and 85 transitions. Second operand has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 3 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-20 22:26:37,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:26:37,443 INFO L93 Difference]: Finished difference Result 78 states and 100 transitions. [2022-03-20 22:26:37,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 22:26:37,444 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 3 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) Word has length 43 [2022-03-20 22:26:37,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:26:37,444 INFO L225 Difference]: With dead ends: 78 [2022-03-20 22:26:37,444 INFO L226 Difference]: Without dead ends: 73 [2022-03-20 22:26:37,445 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2022-03-20 22:26:37,445 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 27 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 22:26:37,445 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 153 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 22:26:37,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-03-20 22:26:37,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2022-03-20 22:26:37,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 52 states have (on average 1.3076923076923077) internal successors, (68), 52 states have internal predecessors, (68), 13 states have call successors, (13), 8 states have call predecessors, (13), 6 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-20 22:26:37,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 92 transitions. [2022-03-20 22:26:37,456 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 92 transitions. Word has length 43 [2022-03-20 22:26:37,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:26:37,456 INFO L478 AbstractCegarLoop]: Abstraction has 72 states and 92 transitions. [2022-03-20 22:26:37,456 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 3 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-20 22:26:37,456 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 92 transitions. [2022-03-20 22:26:37,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-20 22:26:37,457 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:26:37,457 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:26:37,473 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 22:26:37,671 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 22:26:37,671 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:26:37,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:26:37,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1372706166, now seen corresponding path program 1 times [2022-03-20 22:26:37,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:26:37,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2127404083] [2022-03-20 22:26:37,672 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:26:37,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1372706166, now seen corresponding path program 2 times [2022-03-20 22:26:37,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:26:37,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117953589] [2022-03-20 22:26:37,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:26:37,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:26:37,680 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:26:37,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1270826075] [2022-03-20 22:26:37,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 22:26:37,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:26:37,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:26:37,688 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 22:26:37,690 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 22:26:37,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 22:26:37,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:26:37,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-20 22:26:37,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:26:37,860 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-03-20 22:26:37,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:26:38,008 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-20 22:26:38,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:26:38,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117953589] [2022-03-20 22:26:38,009 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:26:38,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270826075] [2022-03-20 22:26:38,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270826075] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 22:26:38,009 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 22:26:38,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2022-03-20 22:26:38,009 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:26:38,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2127404083] [2022-03-20 22:26:38,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2127404083] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:26:38,010 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:26:38,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 22:26:38,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486192933] [2022-03-20 22:26:38,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:26:38,010 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 22:26:38,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:26:38,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 22:26:38,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-03-20 22:26:38,011 INFO L87 Difference]: Start difference. First operand 72 states and 92 transitions. Second operand has 9 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-20 22:26:40,031 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 22:26:42,419 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 22:26:42,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:26:42,773 INFO L93 Difference]: Finished difference Result 85 states and 111 transitions. [2022-03-20 22:26:42,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 22:26:42,773 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 44 [2022-03-20 22:26:42,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:26:42,774 INFO L225 Difference]: With dead ends: 85 [2022-03-20 22:26:42,774 INFO L226 Difference]: Without dead ends: 80 [2022-03-20 22:26:42,774 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-03-20 22:26:42,775 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 10 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-03-20 22:26:42,775 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 161 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 128 Invalid, 2 Unknown, 0 Unchecked, 4.7s Time] [2022-03-20 22:26:42,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-03-20 22:26:42,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 67. [2022-03-20 22:26:42,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 48 states have (on average 1.25) internal successors, (60), 48 states have internal predecessors, (60), 12 states have call successors, (12), 8 states have call predecessors, (12), 6 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 22:26:42,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 82 transitions. [2022-03-20 22:26:42,785 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 82 transitions. Word has length 44 [2022-03-20 22:26:42,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:26:42,785 INFO L478 AbstractCegarLoop]: Abstraction has 67 states and 82 transitions. [2022-03-20 22:26:42,785 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-20 22:26:42,785 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 82 transitions. [2022-03-20 22:26:42,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-20 22:26:42,786 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:26:42,786 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:26:42,806 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 22:26:42,999 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 22:26:43,000 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:26:43,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:26:43,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1114540728, now seen corresponding path program 1 times [2022-03-20 22:26:43,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:26:43,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [706171594] [2022-03-20 22:26:43,000 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:26:43,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1114540728, now seen corresponding path program 2 times [2022-03-20 22:26:43,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:26:43,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883002265] [2022-03-20 22:26:43,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:26:43,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:26:43,007 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:26:43,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1573549333] [2022-03-20 22:26:43,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 22:26:43,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:26:43,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:26:43,009 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 22:26:43,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-20 22:26:43,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 22:26:43,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:26:43,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-20 22:26:43,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:26:43,571 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 22:26:43,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:26:43,763 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-20 22:26:43,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:26:43,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883002265] [2022-03-20 22:26:43,764 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:26:43,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573549333] [2022-03-20 22:26:43,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573549333] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 22:26:43,764 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 22:26:43,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8] total 18 [2022-03-20 22:26:43,764 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:26:43,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [706171594] [2022-03-20 22:26:43,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [706171594] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:26:43,764 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:26:43,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 22:26:43,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694926427] [2022-03-20 22:26:43,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:26:43,765 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 22:26:43,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:26:43,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 22:26:43,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2022-03-20 22:26:43,765 INFO L87 Difference]: Start difference. First operand 67 states and 82 transitions. Second operand has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 12 states have internal predecessors, (27), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-20 22:26:45,979 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 22:26:48,432 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 22:26:48,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:26:48,580 INFO L93 Difference]: Finished difference Result 78 states and 97 transitions. [2022-03-20 22:26:48,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 22:26:48,580 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 12 states have internal predecessors, (27), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 44 [2022-03-20 22:26:48,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:26:48,581 INFO L225 Difference]: With dead ends: 78 [2022-03-20 22:26:48,581 INFO L226 Difference]: Without dead ends: 73 [2022-03-20 22:26:48,581 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2022-03-20 22:26:48,582 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 33 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 11 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-03-20 22:26:48,582 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 140 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 194 Invalid, 2 Unknown, 0 Unchecked, 4.6s Time] [2022-03-20 22:26:48,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-03-20 22:26:48,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 67. [2022-03-20 22:26:48,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 48 states have (on average 1.25) internal successors, (60), 48 states have internal predecessors, (60), 12 states have call successors, (12), 8 states have call predecessors, (12), 6 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 22:26:48,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 82 transitions. [2022-03-20 22:26:48,598 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 82 transitions. Word has length 44 [2022-03-20 22:26:48,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:26:48,599 INFO L478 AbstractCegarLoop]: Abstraction has 67 states and 82 transitions. [2022-03-20 22:26:48,599 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 12 states have internal predecessors, (27), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-20 22:26:48,599 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 82 transitions. [2022-03-20 22:26:48,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-20 22:26:48,600 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:26:48,600 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 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] [2022-03-20 22:26:48,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-20 22:26:48,816 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-20 22:26:48,816 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:26:48,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:26:48,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1275543934, now seen corresponding path program 1 times [2022-03-20 22:26:48,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:26:48,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [946297227] [2022-03-20 22:26:48,817 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:26:48,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1275543934, now seen corresponding path program 2 times [2022-03-20 22:26:48,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:26:48,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001522535] [2022-03-20 22:26:48,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:26:48,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:26:48,827 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:26:48,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [135145976] [2022-03-20 22:26:48,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 22:26:48,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:26:48,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:26:48,844 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 22:26:48,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-20 22:26:48,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 22:26:48,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:26:48,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-20 22:26:48,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:26:49,016 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-03-20 22:26:49,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:26:49,145 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-03-20 22:26:49,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:26:49,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001522535] [2022-03-20 22:26:49,146 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:26:49,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135145976] [2022-03-20 22:26:49,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135145976] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 22:26:49,146 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 22:26:49,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2022-03-20 22:26:49,146 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:26:49,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [946297227] [2022-03-20 22:26:49,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [946297227] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:26:49,146 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:26:49,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 22:26:49,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482420231] [2022-03-20 22:26:49,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:26:49,147 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 22:26:49,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:26:49,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 22:26:49,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-03-20 22:26:49,147 INFO L87 Difference]: Start difference. First operand 67 states and 82 transitions. Second operand has 9 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-20 22:26:51,439 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 22:26:51,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:26:51,707 INFO L93 Difference]: Finished difference Result 81 states and 101 transitions. [2022-03-20 22:26:51,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 22:26:51,708 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 51 [2022-03-20 22:26:51,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:26:51,710 INFO L225 Difference]: With dead ends: 81 [2022-03-20 22:26:51,710 INFO L226 Difference]: Without dead ends: 76 [2022-03-20 22:26:51,711 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-03-20 22:26:51,711 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 11 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-03-20 22:26:51,711 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 161 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 138 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2022-03-20 22:26:51,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-03-20 22:26:51,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 62. [2022-03-20 22:26:51,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 44 states have (on average 1.2272727272727273) internal successors, (54), 44 states have internal predecessors, (54), 11 states have call successors, (11), 8 states have call predecessors, (11), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 22:26:51,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 74 transitions. [2022-03-20 22:26:51,722 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 74 transitions. Word has length 51 [2022-03-20 22:26:51,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:26:51,722 INFO L478 AbstractCegarLoop]: Abstraction has 62 states and 74 transitions. [2022-03-20 22:26:51,722 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-20 22:26:51,722 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 74 transitions. [2022-03-20 22:26:51,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-03-20 22:26:51,722 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:26:51,722 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 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 22:26:51,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-20 22:26:51,935 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-20 22:26:51,935 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:26:51,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:26:51,936 INFO L85 PathProgramCache]: Analyzing trace with hash 2079436449, now seen corresponding path program 1 times [2022-03-20 22:26:51,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:26:51,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1717291310] [2022-03-20 22:26:51,936 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:26:51,936 INFO L85 PathProgramCache]: Analyzing trace with hash 2079436449, now seen corresponding path program 2 times [2022-03-20 22:26:51,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:26:51,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540807284] [2022-03-20 22:26:51,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:26:51,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:26:51,942 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:26:51,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [50931347] [2022-03-20 22:26:51,942 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 22:26:51,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:26:51,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:26:51,944 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 22:26:51,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-20 22:26:51,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 22:26:51,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:26:51,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-20 22:26:51,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:26:52,329 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 11 proven. 17 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 22:26:52,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:26:52,457 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-03-20 22:26:52,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:26:52,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540807284] [2022-03-20 22:26:52,457 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:26:52,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50931347] [2022-03-20 22:26:52,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50931347] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 22:26:52,457 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 22:26:52,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8] total 18 [2022-03-20 22:26:52,458 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:26:52,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1717291310] [2022-03-20 22:26:52,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1717291310] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:26:52,458 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:26:52,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 22:26:52,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272310246] [2022-03-20 22:26:52,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:26:52,458 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 22:26:52,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:26:52,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 22:26:52,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2022-03-20 22:26:52,459 INFO L87 Difference]: Start difference. First operand 62 states and 74 transitions. Second operand has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 6 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-03-20 22:26:54,732 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 22:26:55,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:26:55,398 INFO L93 Difference]: Finished difference Result 88 states and 113 transitions. [2022-03-20 22:26:55,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 22:26:55,399 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 6 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 52 [2022-03-20 22:26:55,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:26:55,399 INFO L225 Difference]: With dead ends: 88 [2022-03-20 22:26:55,399 INFO L226 Difference]: Without dead ends: 83 [2022-03-20 22:26:55,400 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2022-03-20 22:26:55,414 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 42 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 19 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-03-20 22:26:55,414 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 204 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 240 Invalid, 1 Unknown, 0 Unchecked, 2.7s Time] [2022-03-20 22:26:55,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-03-20 22:26:55,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 74. [2022-03-20 22:26:55,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 54 states have (on average 1.2962962962962963) internal successors, (70), 54 states have internal predecessors, (70), 13 states have call successors, (13), 8 states have call predecessors, (13), 6 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-20 22:26:55,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 94 transitions. [2022-03-20 22:26:55,434 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 94 transitions. Word has length 52 [2022-03-20 22:26:55,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:26:55,434 INFO L478 AbstractCegarLoop]: Abstraction has 74 states and 94 transitions. [2022-03-20 22:26:55,434 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 6 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-03-20 22:26:55,434 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 94 transitions. [2022-03-20 22:26:55,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-20 22:26:55,434 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:26:55,434 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:26:55,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-20 22:26:55,647 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-20 22:26:55,648 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:26:55,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:26:55,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1287237523, now seen corresponding path program 1 times [2022-03-20 22:26:55,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:26:55,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [140022473] [2022-03-20 22:26:55,648 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:26:55,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1287237523, now seen corresponding path program 2 times [2022-03-20 22:26:55,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:26:55,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073259786] [2022-03-20 22:26:55,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:26:55,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:26:55,660 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:26:55,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [591460761] [2022-03-20 22:26:55,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 22:26:55,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:26:55,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:26:55,668 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 22:26:55,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-20 22:26:55,711 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 22:26:55,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:26:55,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-20 22:26:55,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:26:55,891 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 28 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 22:26:55,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:26:56,125 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-03-20 22:26:56,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:26:56,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073259786] [2022-03-20 22:26:56,125 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:26:56,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591460761] [2022-03-20 22:26:56,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591460761] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 22:26:56,126 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 22:26:56,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 15 [2022-03-20 22:26:56,126 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:26:56,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [140022473] [2022-03-20 22:26:56,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [140022473] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:26:56,126 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:26:56,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 22:26:56,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808603546] [2022-03-20 22:26:56,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:26:56,126 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 22:26:56,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:26:56,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 22:26:56,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-03-20 22:26:56,127 INFO L87 Difference]: Start difference. First operand 74 states and 94 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-03-20 22:26:56,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:26:56,259 INFO L93 Difference]: Finished difference Result 108 states and 142 transitions. [2022-03-20 22:26:56,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 22:26:56,259 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 53 [2022-03-20 22:26:56,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:26:56,260 INFO L225 Difference]: With dead ends: 108 [2022-03-20 22:26:56,260 INFO L226 Difference]: Without dead ends: 76 [2022-03-20 22:26:56,260 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2022-03-20 22:26:56,261 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 23 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 22:26:56,261 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 150 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 22:26:56,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-03-20 22:26:56,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 68. [2022-03-20 22:26:56,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 48 states have (on average 1.2291666666666667) internal successors, (59), 49 states have internal predecessors, (59), 13 states have call successors, (13), 8 states have call predecessors, (13), 6 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-20 22:26:56,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 83 transitions. [2022-03-20 22:26:56,277 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 83 transitions. Word has length 53 [2022-03-20 22:26:56,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:26:56,277 INFO L478 AbstractCegarLoop]: Abstraction has 68 states and 83 transitions. [2022-03-20 22:26:56,277 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-03-20 22:26:56,277 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 83 transitions. [2022-03-20 22:26:56,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-20 22:26:56,277 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:26:56,277 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:26:56,294 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-20 22:26:56,491 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:26:56,491 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:26:56,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:26:56,492 INFO L85 PathProgramCache]: Analyzing trace with hash 338559610, now seen corresponding path program 3 times [2022-03-20 22:26:56,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:26:56,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1256366948] [2022-03-20 22:26:56,492 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:26:56,492 INFO L85 PathProgramCache]: Analyzing trace with hash 338559610, now seen corresponding path program 4 times [2022-03-20 22:26:56,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:26:56,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836364257] [2022-03-20 22:26:56,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:26:56,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:26:56,498 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:26:56,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [602572108] [2022-03-20 22:26:56,498 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 22:26:56,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:26:56,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:26:56,503 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 22:26:56,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-20 22:26:56,535 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 22:26:56,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:26:56,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-20 22:26:56,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:26:56,805 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 22:26:56,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:26:57,277 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-03-20 22:26:57,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:26:57,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836364257] [2022-03-20 22:26:57,278 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:26:57,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602572108] [2022-03-20 22:26:57,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602572108] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 22:26:57,278 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 22:26:57,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [12] total 21 [2022-03-20 22:26:57,278 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:26:57,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1256366948] [2022-03-20 22:26:57,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1256366948] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:26:57,278 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:26:57,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 22:26:57,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686649928] [2022-03-20 22:26:57,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:26:57,279 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 22:26:57,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:26:57,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 22:26:57,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2022-03-20 22:26:57,279 INFO L87 Difference]: Start difference. First operand 68 states and 83 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-03-20 22:26:57,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:26:57,589 INFO L93 Difference]: Finished difference Result 97 states and 122 transitions. [2022-03-20 22:26:57,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 22:26:57,591 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 54 [2022-03-20 22:26:57,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:26:57,592 INFO L225 Difference]: With dead ends: 97 [2022-03-20 22:26:57,592 INFO L226 Difference]: Without dead ends: 74 [2022-03-20 22:26:57,595 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=145, Invalid=557, Unknown=0, NotChecked=0, Total=702 [2022-03-20 22:26:57,595 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 23 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 22:26:57,595 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 150 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 22:26:57,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-03-20 22:26:57,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2022-03-20 22:26:57,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 53 states have (on average 1.2452830188679245) internal successors, (66), 54 states have internal predecessors, (66), 14 states have call successors, (14), 8 states have call predecessors, (14), 6 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-20 22:26:57,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 92 transitions. [2022-03-20 22:26:57,616 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 92 transitions. Word has length 54 [2022-03-20 22:26:57,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:26:57,616 INFO L478 AbstractCegarLoop]: Abstraction has 74 states and 92 transitions. [2022-03-20 22:26:57,616 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-03-20 22:26:57,616 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 92 transitions. [2022-03-20 22:26:57,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-03-20 22:26:57,616 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:26:57,617 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:26:57,632 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-03-20 22:26:57,832 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-20 22:26:57,833 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:26:57,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:26:57,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1563197702, now seen corresponding path program 3 times [2022-03-20 22:26:57,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:26:57,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1575135680] [2022-03-20 22:26:57,833 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:26:57,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1563197702, now seen corresponding path program 4 times [2022-03-20 22:26:57,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:26:57,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899593964] [2022-03-20 22:26:57,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:26:57,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:26:57,840 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:26:57,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [420027799] [2022-03-20 22:26:57,840 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 22:26:57,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:26:57,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:26:57,841 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 22:26:57,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-20 22:26:57,875 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 22:26:57,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:26:57,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 44 conjunts are in the unsatisfiable core [2022-03-20 22:26:57,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:26:59,009 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 16 proven. 22 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-03-20 22:26:59,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:26:59,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:26:59,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899593964] [2022-03-20 22:26:59,129 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:26:59,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420027799] [2022-03-20 22:26:59,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420027799] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 22:26:59,129 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 22:26:59,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2022-03-20 22:26:59,129 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:26:59,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1575135680] [2022-03-20 22:26:59,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1575135680] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:26:59,129 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:26:59,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-20 22:26:59,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90995170] [2022-03-20 22:26:59,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:26:59,130 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-20 22:26:59,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:26:59,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-20 22:26:59,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-03-20 22:26:59,130 INFO L87 Difference]: Start difference. First operand 74 states and 92 transitions. Second operand has 19 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 16 states have internal predecessors, (30), 8 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2022-03-20 22:26:59,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:26:59,650 INFO L93 Difference]: Finished difference Result 102 states and 134 transitions. [2022-03-20 22:26:59,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-20 22:26:59,650 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 16 states have internal predecessors, (30), 8 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 60 [2022-03-20 22:26:59,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:26:59,651 INFO L225 Difference]: With dead ends: 102 [2022-03-20 22:26:59,651 INFO L226 Difference]: Without dead ends: 97 [2022-03-20 22:26:59,651 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2022-03-20 22:26:59,652 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 52 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 125 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 22:26:59,652 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 238 Invalid, 553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 402 Invalid, 0 Unknown, 125 Unchecked, 0.2s Time] [2022-03-20 22:26:59,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-03-20 22:26:59,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 78. [2022-03-20 22:26:59,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 56 states have (on average 1.25) internal successors, (70), 57 states have internal predecessors, (70), 15 states have call successors, (15), 8 states have call predecessors, (15), 6 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-20 22:26:59,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 98 transitions. [2022-03-20 22:26:59,674 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 98 transitions. Word has length 60 [2022-03-20 22:26:59,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:26:59,675 INFO L478 AbstractCegarLoop]: Abstraction has 78 states and 98 transitions. [2022-03-20 22:26:59,675 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 16 states have internal predecessors, (30), 8 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2022-03-20 22:26:59,675 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 98 transitions. [2022-03-20 22:26:59,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-20 22:26:59,675 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:26:59,675 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:26:59,709 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-20 22:26:59,891 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-20 22:26:59,892 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:26:59,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:26:59,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1988072646, now seen corresponding path program 1 times [2022-03-20 22:26:59,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:26:59,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [365069363] [2022-03-20 22:26:59,893 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:26:59,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1988072646, now seen corresponding path program 2 times [2022-03-20 22:26:59,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:26:59,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642640989] [2022-03-20 22:26:59,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:26:59,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:26:59,910 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:26:59,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [851532890] [2022-03-20 22:26:59,910 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 22:26:59,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:26:59,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:26:59,912 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 22:26:59,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-20 22:26:59,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 22:26:59,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:26:59,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-20 22:26:59,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:27:00,481 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 25 proven. 20 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-03-20 22:27:00,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:27:00,706 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-03-20 22:27:00,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:27:00,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642640989] [2022-03-20 22:27:00,706 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:27:00,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851532890] [2022-03-20 22:27:00,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851532890] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 22:27:00,707 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 22:27:00,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 8] total 21 [2022-03-20 22:27:00,707 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:27:00,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [365069363] [2022-03-20 22:27:00,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [365069363] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:27:00,707 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:27:00,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-20 22:27:00,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43701257] [2022-03-20 22:27:00,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:27:00,707 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 22:27:00,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:27:00,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 22:27:00,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-03-20 22:27:00,708 INFO L87 Difference]: Start difference. First operand 78 states and 98 transitions. Second operand has 18 states, 17 states have (on average 2.0) internal successors, (34), 15 states have internal predecessors, (34), 6 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2022-03-20 22:27:03,371 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 22:27:04,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:27:04,404 INFO L93 Difference]: Finished difference Result 110 states and 144 transitions. [2022-03-20 22:27:04,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-20 22:27:04,405 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 15 states have internal predecessors, (34), 6 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) Word has length 61 [2022-03-20 22:27:04,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:27:04,406 INFO L225 Difference]: With dead ends: 110 [2022-03-20 22:27:04,407 INFO L226 Difference]: Without dead ends: 105 [2022-03-20 22:27:04,407 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 101 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=140, Invalid=672, Unknown=0, NotChecked=0, Total=812 [2022-03-20 22:27:04,407 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 50 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 20 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-03-20 22:27:04,407 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 171 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 373 Invalid, 1 Unknown, 2 Unchecked, 3.1s Time] [2022-03-20 22:27:04,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-03-20 22:27:04,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 83. [2022-03-20 22:27:04,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 60 states have (on average 1.25) internal successors, (75), 61 states have internal predecessors, (75), 16 states have call successors, (16), 8 states have call predecessors, (16), 6 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-20 22:27:04,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 105 transitions. [2022-03-20 22:27:04,434 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 105 transitions. Word has length 61 [2022-03-20 22:27:04,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:27:04,435 INFO L478 AbstractCegarLoop]: Abstraction has 83 states and 105 transitions. [2022-03-20 22:27:04,435 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 15 states have internal predecessors, (34), 6 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2022-03-20 22:27:04,435 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 105 transitions. [2022-03-20 22:27:04,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-03-20 22:27:04,436 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:27:04,436 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:27:04,453 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-20 22:27:04,651 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-20 22:27:04,652 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:27:04,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:27:04,653 INFO L85 PathProgramCache]: Analyzing trace with hash 165486739, now seen corresponding path program 5 times [2022-03-20 22:27:04,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:27:04,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1189197012] [2022-03-20 22:27:04,653 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:27:04,653 INFO L85 PathProgramCache]: Analyzing trace with hash 165486739, now seen corresponding path program 6 times [2022-03-20 22:27:04,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:27:04,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032168980] [2022-03-20 22:27:04,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:27:04,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:27:04,658 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:27:04,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [644619329] [2022-03-20 22:27:04,658 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 22:27:04,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:27:04,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:27:04,660 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 22:27:04,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-20 22:27:04,709 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-20 22:27:04,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:27:04,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 22:27:04,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:27:04,870 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-03-20 22:27:04,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:27:05,005 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-03-20 22:27:05,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:27:05,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032168980] [2022-03-20 22:27:05,005 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:27:05,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644619329] [2022-03-20 22:27:05,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644619329] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 22:27:05,005 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 22:27:05,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-03-20 22:27:05,005 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:27:05,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1189197012] [2022-03-20 22:27:05,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1189197012] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:27:05,006 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:27:05,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 22:27:05,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305132501] [2022-03-20 22:27:05,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:27:05,006 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 22:27:05,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:27:05,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 22:27:05,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-03-20 22:27:05,006 INFO L87 Difference]: Start difference. First operand 83 states and 105 transitions. Second operand has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-03-20 22:27:07,053 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 22:27:09,294 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 22:27:09,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:27:09,439 INFO L93 Difference]: Finished difference Result 83 states and 105 transitions. [2022-03-20 22:27:09,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 22:27:09,439 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 62 [2022-03-20 22:27:09,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:27:09,440 INFO L225 Difference]: With dead ends: 83 [2022-03-20 22:27:09,440 INFO L226 Difference]: Without dead ends: 0 [2022-03-20 22:27:09,440 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-03-20 22:27:09,441 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 9 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-03-20 22:27:09,441 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 100 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 61 Invalid, 2 Unknown, 0 Unchecked, 4.4s Time] [2022-03-20 22:27:09,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-20 22:27:09,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-20 22:27:09,441 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 22:27:09,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-20 22:27:09,441 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 62 [2022-03-20 22:27:09,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:27:09,442 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-20 22:27:09,442 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-03-20 22:27:09,442 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-20 22:27:09,442 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-20 22:27:09,467 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-20 22:27:09,490 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-20 22:27:09,695 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:27:09,697 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-20 22:27:31,567 WARN L232 SmtUtils]: Spent 20.68s on a formula simplification. DAG size of input: 184 DAG size of output: 176 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-03-20 22:27:39,129 WARN L232 SmtUtils]: Spent 7.53s on a formula simplification. DAG size of input: 195 DAG size of output: 185 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-03-20 22:27:51,191 WARN L232 SmtUtils]: Spent 10.86s on a formula simplification. DAG size of input: 203 DAG size of output: 188 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-03-20 22:28:07,241 WARN L232 SmtUtils]: Spent 13.30s on a formula simplification. DAG size of input: 163 DAG size of output: 34 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-03-20 22:28:41,340 WARN L232 SmtUtils]: Spent 34.02s on a formula simplification. DAG size of input: 173 DAG size of output: 33 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-03-20 22:29:11,107 WARN L232 SmtUtils]: Spent 29.15s on a formula simplification. DAG size of input: 176 DAG size of output: 33 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-03-20 22:29:37,123 WARN L232 SmtUtils]: Spent 25.99s on a formula simplification. DAG size of input: 172 DAG size of output: 26 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-03-20 22:29:37,127 INFO L882 garLoopResultBuilder]: For program point reach_errorEXIT(line 5) no Hoare annotation was computed. [2022-03-20 22:29:37,127 INFO L882 garLoopResultBuilder]: For program point reach_errorENTRY(line 5) no Hoare annotation was computed. [2022-03-20 22:29:37,127 INFO L882 garLoopResultBuilder]: For program point reach_errorFINAL(line 5) no Hoare annotation was computed. [2022-03-20 22:29:37,127 INFO L885 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 8 10) the Hoare annotation is: true [2022-03-20 22:29:37,127 INFO L878 garLoopResultBuilder]: At program point L9(line 9) the Hoare annotation is: (= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|) [2022-03-20 22:29:37,128 INFO L878 garLoopResultBuilder]: At program point L9-2(lines 8 10) 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 22:29:37,128 INFO L878 garLoopResultBuilder]: At program point assume_abort_if_notEXIT(lines 8 10) 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 22:29:37,128 INFO L878 garLoopResultBuilder]: At program point L27(line 27) the Hoare annotation is: (and (<= main_~y~0 10) (<= main_~x~0 10) (<= 0 main_~x~0) (<= 1 main_~y~0)) [2022-03-20 22:29:37,128 INFO L885 garLoopResultBuilder]: At program point L58(line 58) the Hoare annotation is: true [2022-03-20 22:29:37,128 INFO L885 garLoopResultBuilder]: At program point mainEXIT(lines 19 60) the Hoare annotation is: true [2022-03-20 22:29:37,128 INFO L885 garLoopResultBuilder]: At program point mainFINAL(lines 19 60) the Hoare annotation is: true [2022-03-20 22:29:37,128 INFO L878 garLoopResultBuilder]: At program point L44(lines 44 54) the Hoare annotation is: (let ((.cse0 (* main_~y~0 main_~x~0))) (and (<= main_~y~0 10) (<= main_~x~0 10) (<= 0 main_~x~0) (= (+ main_~q~0 (* main_~b~0 main_~a~0 main_~p~0)) .cse0) (= (mod (+ .cse0 (* (- 1) main_~q~0)) (* main_~b~0 main_~a~0)) 0) (not (= main_~b~0 0)) (not (= main_~a~0 0)) (<= 1 main_~y~0))) [2022-03-20 22:29:37,128 INFO L878 garLoopResultBuilder]: At program point L40(lines 40 54) the Hoare annotation is: (let ((.cse0 (* main_~y~0 main_~x~0))) (and (<= main_~y~0 10) (<= main_~x~0 10) (<= 0 main_~x~0) (= (+ main_~q~0 (* main_~b~0 main_~a~0 main_~p~0)) .cse0) (= (mod (+ .cse0 (* (- 1) main_~q~0)) (* main_~b~0 main_~a~0)) 0) (not (= main_~b~0 0)) (not (= main_~a~0 0)) (<= 1 main_~y~0))) [2022-03-20 22:29:37,128 INFO L878 garLoopResultBuilder]: At program point L34-2(lines 34 55) the Hoare annotation is: (and (<= main_~x~0 10) (<= 0 main_~x~0) (= (+ main_~q~0 (* main_~b~0 main_~a~0 main_~p~0)) (* main_~y~0 main_~x~0)) (<= 1 main_~y~0) (= (* main_~b~0 main_~a~0) 0)) [2022-03-20 22:29:37,128 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 19 60) the Hoare annotation is: true [2022-03-20 22:29:37,128 INFO L878 garLoopResultBuilder]: At program point L26(line 26) the Hoare annotation is: (and (<= main_~x~0 10) (<= 0 main_~x~0)) [2022-03-20 22:29:37,128 INFO L878 garLoopResultBuilder]: At program point L26-1(line 26) the Hoare annotation is: (and (<= main_~y~0 10) (<= 0 (+ (div (+ (- 2) main_~y~0) 2) 1)) (<= main_~x~0 10) (<= 0 main_~x~0)) [2022-03-20 22:29:37,128 INFO L878 garLoopResultBuilder]: At program point L57(line 57) the Hoare annotation is: (and (<= main_~x~0 10) (<= 0 main_~x~0) (<= 1 main_~y~0) (= (* main_~b~0 main_~a~0) 0)) [2022-03-20 22:29:37,128 INFO L885 garLoopResultBuilder]: At program point L24(line 24) the Hoare annotation is: true [2022-03-20 22:29:37,128 INFO L878 garLoopResultBuilder]: At program point L24-1(line 24) the Hoare annotation is: (and (<= main_~x~0 10) (<= 0 main_~x~0)) [2022-03-20 22:29:37,128 INFO L878 garLoopResultBuilder]: At program point L47(lines 47 54) the Hoare annotation is: (let ((.cse0 (* main_~y~0 main_~x~0))) (and (<= main_~y~0 10) (<= main_~x~0 10) (<= 0 main_~x~0) (= (+ main_~q~0 (* main_~b~0 main_~a~0 main_~p~0)) .cse0) (= (mod (+ .cse0 (* (- 1) main_~q~0)) (* main_~b~0 main_~a~0)) 0) (not (= main_~b~0 0)) (not (= main_~a~0 0)) (<= 1 main_~y~0))) [2022-03-20 22:29:37,128 INFO L878 garLoopResultBuilder]: At program point L47-2(lines 34 55) the Hoare annotation is: (and (<= main_~y~0 10) (<= main_~x~0 10) (<= 0 main_~x~0) (= (+ main_~q~0 (* main_~b~0 main_~a~0 main_~p~0)) (* main_~y~0 main_~x~0)) (<= 1 main_~y~0)) [2022-03-20 22:29:37,129 INFO L878 garLoopResultBuilder]: At program point L35(line 35) the Hoare annotation is: (and (<= main_~y~0 10) (<= main_~x~0 10) (<= 0 main_~x~0) (= (+ main_~q~0 (* main_~b~0 main_~a~0 main_~p~0)) (* main_~y~0 main_~x~0)) (<= 1 main_~y~0)) [2022-03-20 22:29:37,129 INFO L878 garLoopResultBuilder]: At program point L35-1(lines 34 55) the Hoare annotation is: (let ((.cse0 (* main_~y~0 main_~x~0))) (and (<= main_~y~0 10) (<= main_~x~0 10) (<= 0 main_~x~0) (= (+ main_~q~0 (* main_~b~0 main_~a~0 main_~p~0)) .cse0) (or (= (mod (+ .cse0 (* (- 1) main_~q~0)) (* main_~b~0 main_~a~0)) 0) (= main_~q~0 .cse0)) (<= 1 main_~y~0))) [2022-03-20 22:29:37,129 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2022-03-20 22:29:37,129 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 22:29:37,129 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2022-03-20 22:29:37,129 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2022-03-20 22:29:37,129 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-03-20 22:29:37,129 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-03-20 22:29:37,129 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2022-03-20 22:29:37,129 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 11 17) the Hoare annotation is: true [2022-03-20 22:29:37,129 INFO L878 garLoopResultBuilder]: At program point L13(lines 13 14) the Hoare annotation is: (not (<= 1 |__VERIFIER_assert_#in~cond|)) [2022-03-20 22:29:37,129 INFO L878 garLoopResultBuilder]: At program point L12(lines 12 15) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (not (<= 1 |__VERIFIER_assert_#in~cond|))) [2022-03-20 22:29:37,129 INFO L878 garLoopResultBuilder]: At program point L12-2(lines 11 17) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (not (<= 1 |__VERIFIER_assert_#in~cond|))) [2022-03-20 22:29:37,129 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertEXIT(lines 11 17) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (not (<= 1 |__VERIFIER_assert_#in~cond|))) [2022-03-20 22:29:37,129 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 14) the Hoare annotation is: (not (<= 1 |__VERIFIER_assert_#in~cond|)) [2022-03-20 22:29:37,131 INFO L719 BasicCegarLoop]: Path program histogram: [6, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2] [2022-03-20 22:29:37,132 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-20 22:29:37,142 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 10:29:37 BoogieIcfgContainer [2022-03-20 22:29:37,142 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-20 22:29:37,142 INFO L158 Benchmark]: Toolchain (without parser) took 191020.92ms. Allocated memory was 178.3MB in the beginning and 330.3MB in the end (delta: 152.0MB). Free memory was 128.1MB in the beginning and 221.1MB in the end (delta: -93.0MB). Peak memory consumption was 180.8MB. Max. memory is 8.0GB. [2022-03-20 22:29:37,142 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 178.3MB. Free memory is still 144.1MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-20 22:29:37,143 INFO L158 Benchmark]: CACSL2BoogieTranslator took 176.21ms. Allocated memory is still 178.3MB. Free memory was 128.0MB in the beginning and 149.7MB in the end (delta: -21.7MB). Peak memory consumption was 9.2MB. Max. memory is 8.0GB. [2022-03-20 22:29:37,143 INFO L158 Benchmark]: Boogie Preprocessor took 17.19ms. Allocated memory is still 178.3MB. Free memory was 149.7MB in the beginning and 148.3MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-20 22:29:37,143 INFO L158 Benchmark]: RCFGBuilder took 294.93ms. Allocated memory is still 178.3MB. Free memory was 148.3MB in the beginning and 137.1MB in the end (delta: 11.2MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-03-20 22:29:37,143 INFO L158 Benchmark]: TraceAbstraction took 190526.70ms. Allocated memory was 178.3MB in the beginning and 330.3MB in the end (delta: 152.0MB). Free memory was 136.7MB in the beginning and 221.1MB in the end (delta: -84.3MB). Peak memory consumption was 189.5MB. Max. memory is 8.0GB. [2022-03-20 22:29:37,144 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 178.3MB. Free memory is still 144.1MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 176.21ms. Allocated memory is still 178.3MB. Free memory was 128.0MB in the beginning and 149.7MB in the end (delta: -21.7MB). Peak memory consumption was 9.2MB. Max. memory is 8.0GB. * Boogie Preprocessor took 17.19ms. Allocated memory is still 178.3MB. Free memory was 149.7MB in the beginning and 148.3MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 294.93ms. Allocated memory is still 178.3MB. Free memory was 148.3MB in the beginning and 137.1MB in the end (delta: 11.2MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 190526.70ms. Allocated memory was 178.3MB in the beginning and 330.3MB in the end (delta: 152.0MB). Free memory was 136.7MB in the beginning and 221.1MB in the end (delta: -84.3MB). Peak memory consumption was 189.5MB. 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: 14]: 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, 37 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 190.5s, OverallIterations: 19, TraceHistogramMax: 5, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 27.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 147.4s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 9 mSolverCounterUnknown, 545 SdHoareTripleChecker+Valid, 24.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 503 mSDsluCounter, 2662 SdHoareTripleChecker+Invalid, 24.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 127 IncrementalHoareTripleChecker+Unchecked, 2186 mSDsCounter, 198 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2909 IncrementalHoareTripleChecker+Invalid, 3243 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 198 mSolverCounterUnsat, 476 mSDtfsCounter, 2909 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1612 GetRequests, 1311 SyntacticMatches, 17 SemanticMatches, 284 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1004 ImplicationChecksByTransitivity, 4.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=83occurred in iteration=18, InterpolantAutomatonStates: 198, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 19 MinimizatonAttempts, 125 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 34 LocationsWithAnnotation, 272 PreInvPairs, 401 NumberOfFragments, 377 HoareAnnotationTreeSize, 272 FomulaSimplifications, 53664 FormulaSimplificationTreeSizeReduction, 43.8s HoareSimplificationTime, 34 FomulaSimplificationsInter, 1066967 FormulaSimplificationTreeSizeReductionInter, 103.6s 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: 34]: Loop Invariant Derived loop invariant: (((y <= 10 && x <= 10) && 0 <= x) && q + b * a * p == y * x) && 1 <= y - ProcedureContractResult [Line: 8]: Procedure Contract for assume_abort_if_not Derived contract for procedure assume_abort_if_not: !(\old(cond) == 0) && cond == \old(cond) - ProcedureContractResult [Line: 19]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 11]: 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 22:29:37,180 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...