/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/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/lcm1_unwindbound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-17 22:14:34,581 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-17 22:14:34,582 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-17 22:14:34,610 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-17 22:14:34,611 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-17 22:14:34,612 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-17 22:14:34,613 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-17 22:14:34,614 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-17 22:14:34,616 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-17 22:14:34,617 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-17 22:14:34,617 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-17 22:14:34,618 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-17 22:14:34,619 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-17 22:14:34,620 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-17 22:14:34,621 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-17 22:14:34,622 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-17 22:14:34,622 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-17 22:14:34,623 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-17 22:14:34,624 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-17 22:14:34,626 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-17 22:14:34,627 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-17 22:14:34,628 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-17 22:14:34,629 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-17 22:14:34,630 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-17 22:14:34,630 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-17 22:14:34,632 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-17 22:14:34,639 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-17 22:14:34,640 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-17 22:14:34,648 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-17 22:14:34,649 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-03-17 22:14:34,677 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-17 22:14:34,678 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-17 22:14:34,680 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-17 22:14:34,680 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-17 22:14:34,681 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-17 22:14:34,681 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-17 22:14:34,681 INFO L138 SettingsManager]: * Use SBE=true [2022-03-17 22:14:34,682 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-17 22:14:34,682 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-17 22:14:34,682 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-17 22:14:34,683 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-17 22:14:34,683 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-17 22:14:34,683 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-17 22:14:34,683 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-17 22:14:34,683 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-17 22:14:34,683 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-17 22:14:34,684 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-17 22:14:34,684 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-17 22:14:34,684 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-17 22:14:34,684 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 22:14:34,684 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-17 22:14:34,684 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-17 22:14:34,685 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-17 22:14:34,685 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-17 22:14:34,685 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-17 22:14:34,685 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-17 22:14:34,685 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-17 22:14:34,686 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-17 22:14:34,687 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-17 22:14:34,687 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-17 22:14:34,868 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-17 22:14:34,884 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-17 22:14:34,886 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-17 22:14:34,887 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-17 22:14:34,887 INFO L275 PluginConnector]: CDTParser initialized [2022-03-17 22:14:34,888 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/lcm1_unwindbound100.c [2022-03-17 22:14:34,949 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/87d5c09d7/2352487fabe54a96a47b3d8917978953/FLAGd73f98553 [2022-03-17 22:14:35,359 INFO L306 CDTParser]: Found 1 translation units. [2022-03-17 22:14:35,360 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/lcm1_unwindbound100.c [2022-03-17 22:14:35,365 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/87d5c09d7/2352487fabe54a96a47b3d8917978953/FLAGd73f98553 [2022-03-17 22:14:35,376 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/87d5c09d7/2352487fabe54a96a47b3d8917978953 [2022-03-17 22:14:35,379 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-17 22:14:35,380 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-17 22:14:35,381 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-17 22:14:35,381 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-17 22:14:35,383 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-17 22:14:35,384 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 10:14:35" (1/1) ... [2022-03-17 22:14:35,385 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78ccb14d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 10:14:35, skipping insertion in model container [2022-03-17 22:14:35,385 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 10:14:35" (1/1) ... [2022-03-17 22:14:35,390 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-17 22:14:35,401 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-17 22:14:35,553 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/lcm1_unwindbound100.c[552,565] [2022-03-17 22:14:35,585 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 22:14:35,596 INFO L203 MainTranslator]: Completed pre-run [2022-03-17 22:14:35,609 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/lcm1_unwindbound100.c[552,565] [2022-03-17 22:14:35,627 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 22:14:35,639 INFO L208 MainTranslator]: Completed translation [2022-03-17 22:14:35,640 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 10:14:35 WrapperNode [2022-03-17 22:14:35,641 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-17 22:14:35,642 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-17 22:14:35,642 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-17 22:14:35,642 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-17 22:14:35,651 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 10:14:35" (1/1) ... [2022-03-17 22:14:35,651 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 10:14:35" (1/1) ... [2022-03-17 22:14:35,663 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 10:14:35" (1/1) ... [2022-03-17 22:14:35,663 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 10:14:35" (1/1) ... [2022-03-17 22:14:35,675 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 10:14:35" (1/1) ... [2022-03-17 22:14:35,678 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 10:14:35" (1/1) ... [2022-03-17 22:14:35,679 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 10:14:35" (1/1) ... [2022-03-17 22:14:35,680 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-17 22:14:35,681 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-17 22:14:35,681 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-17 22:14:35,681 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-17 22:14:35,683 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 10:14:35" (1/1) ... [2022-03-17 22:14:35,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 22:14:35,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 22:14:35,712 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) [2022-03-17 22:14:35,745 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 [2022-03-17 22:14:35,757 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-17 22:14:35,757 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-17 22:14:35,757 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-17 22:14:35,757 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-17 22:14:35,758 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-17 22:14:35,758 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-17 22:14:35,758 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-17 22:14:35,759 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-17 22:14:35,759 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-17 22:14:35,759 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-17 22:14:35,759 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-03-17 22:14:35,760 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-17 22:14:35,760 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-17 22:14:35,760 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-17 22:14:35,760 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-17 22:14:35,760 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-17 22:14:35,760 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-17 22:14:35,760 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-17 22:14:35,760 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-17 22:14:35,761 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-17 22:14:35,821 INFO L234 CfgBuilder]: Building ICFG [2022-03-17 22:14:35,823 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-17 22:14:35,993 INFO L275 CfgBuilder]: Performing block encoding [2022-03-17 22:14:35,998 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-17 22:14:35,998 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-03-17 22:14:35,999 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 10:14:35 BoogieIcfgContainer [2022-03-17 22:14:36,000 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-17 22:14:36,000 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-17 22:14:36,000 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-17 22:14:36,001 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-17 22:14:36,004 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 10:14:35" (1/1) ... [2022-03-17 22:14:36,019 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 10:14:36 BasicIcfg [2022-03-17 22:14:36,020 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-17 22:14:36,021 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-17 22:14:36,021 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-17 22:14:36,023 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-17 22:14:36,023 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 10:14:35" (1/4) ... [2022-03-17 22:14:36,024 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@236d5cc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 10:14:36, skipping insertion in model container [2022-03-17 22:14:36,024 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 10:14:35" (2/4) ... [2022-03-17 22:14:36,024 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@236d5cc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 10:14:36, skipping insertion in model container [2022-03-17 22:14:36,024 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 10:14:35" (3/4) ... [2022-03-17 22:14:36,025 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@236d5cc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 10:14:36, skipping insertion in model container [2022-03-17 22:14:36,025 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 10:14:36" (4/4) ... [2022-03-17 22:14:36,025 INFO L111 eAbstractionObserver]: Analyzing ICFG lcm1_unwindbound100.cqvasr [2022-03-17 22:14:36,029 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-17 22:14:36,029 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-17 22:14:36,086 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-17 22:14:36,094 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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 [2022-03-17 22:14:36,095 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-17 22:14:36,120 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-17 22:14:36,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-17 22:14:36,125 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 22:14:36,125 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 22:14:36,126 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 22:14:36,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 22:14:36,134 INFO L85 PathProgramCache]: Analyzing trace with hash -615641025, now seen corresponding path program 1 times [2022-03-17 22:14:36,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 22:14:36,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486595679] [2022-03-17 22:14:36,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 22:14:36,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 22:14:36,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 22:14:36,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 22:14:36,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 22:14:36,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 22:14:36,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 22:14:36,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-17 22:14:36,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 22:14:36,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-17 22:14:36,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 22:14:36,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-03-17 22:14:36,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 22:14:36,402 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-17 22:14:36,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 22:14:36,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486595679] [2022-03-17 22:14:36,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486595679] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 22:14:36,403 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 22:14:36,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-17 22:14:36,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504678502] [2022-03-17 22:14:36,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 22:14:36,410 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-17 22:14:36,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 22:14:36,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-17 22:14:36,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 22:14:36,433 INFO L87 Difference]: Start difference. First operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-17 22:14:36,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 22:14:36,566 INFO L93 Difference]: Finished difference Result 74 states and 117 transitions. [2022-03-17 22:14:36,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-17 22:14:36,568 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 32 [2022-03-17 22:14:36,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 22:14:36,574 INFO L225 Difference]: With dead ends: 74 [2022-03-17 22:14:36,574 INFO L226 Difference]: Without dead ends: 36 [2022-03-17 22:14:36,581 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 22:14:36,584 INFO L912 BasicCegarLoop]: 47 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 22:14:36,585 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 51 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 22:14:36,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-03-17 22:14:36,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2022-03-17 22:14:36,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-17 22:14:36,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 47 transitions. [2022-03-17 22:14:36,628 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 47 transitions. Word has length 32 [2022-03-17 22:14:36,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 22:14:36,629 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 47 transitions. [2022-03-17 22:14:36,630 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-17 22:14:36,630 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 47 transitions. [2022-03-17 22:14:36,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-17 22:14:36,632 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 22:14:36,633 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 22:14:36,633 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-17 22:14:36,634 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 22:14:36,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 22:14:36,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1244400054, now seen corresponding path program 1 times [2022-03-17 22:14:36,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 22:14:36,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411457807] [2022-03-17 22:14:36,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 22:14:36,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 22:14:36,677 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 22:14:36,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [167186111] [2022-03-17 22:14:36,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 22:14:36,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 22:14:36,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 22:14:36,691 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) [2022-03-17 22:14:36,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-17 22:14:36,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 22:14:36,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-17 22:14:36,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 22:14:36,937 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-17 22:14:36,937 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 22:14:36,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 22:14:36,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411457807] [2022-03-17 22:14:36,938 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 22:14:36,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167186111] [2022-03-17 22:14:36,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167186111] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 22:14:36,939 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 22:14:36,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 22:14:36,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275013618] [2022-03-17 22:14:36,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 22:14:36,940 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 22:14:36,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 22:14:36,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 22:14:36,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 22:14:36,941 INFO L87 Difference]: Start difference. First operand 35 states and 47 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-17 22:14:36,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 22:14:36,967 INFO L93 Difference]: Finished difference Result 45 states and 58 transitions. [2022-03-17 22:14:36,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 22:14:36,968 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2022-03-17 22:14:36,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 22:14:36,969 INFO L225 Difference]: With dead ends: 45 [2022-03-17 22:14:36,969 INFO L226 Difference]: Without dead ends: 37 [2022-03-17 22:14:36,970 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 22:14:36,971 INFO L912 BasicCegarLoop]: 45 mSDtfsCounter, 0 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 22:14:36,971 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 115 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 22:14:36,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-03-17 22:14:36,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-03-17 22:14:36,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 23 states have internal predecessors, (29), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-17 22:14:36,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 49 transitions. [2022-03-17 22:14:36,979 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 49 transitions. Word has length 33 [2022-03-17 22:14:36,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 22:14:36,980 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 49 transitions. [2022-03-17 22:14:36,981 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-17 22:14:36,981 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 49 transitions. [2022-03-17 22:14:36,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-17 22:14:36,982 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 22:14:36,982 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 22:14:37,015 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-17 22:14:37,205 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 [2022-03-17 22:14:37,205 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 22:14:37,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 22:14:37,206 INFO L85 PathProgramCache]: Analyzing trace with hash 1245472530, now seen corresponding path program 1 times [2022-03-17 22:14:37,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 22:14:37,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438374448] [2022-03-17 22:14:37,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 22:14:37,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 22:14:37,222 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 22:14:37,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1722623677] [2022-03-17 22:14:37,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 22:14:37,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 22:14:37,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 22:14:37,226 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) [2022-03-17 22:14:37,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-17 22:14:37,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 22:14:37,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-17 22:14:37,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 22:14:37,462 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-17 22:14:37,462 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 22:14:37,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 22:14:37,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438374448] [2022-03-17 22:14:37,463 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 22:14:37,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722623677] [2022-03-17 22:14:37,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722623677] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 22:14:37,463 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 22:14:37,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-17 22:14:37,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647307765] [2022-03-17 22:14:37,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 22:14:37,464 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 22:14:37,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 22:14:37,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 22:14:37,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-17 22:14:37,465 INFO L87 Difference]: Start difference. First operand 37 states and 49 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-17 22:14:37,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 22:14:37,541 INFO L93 Difference]: Finished difference Result 57 states and 78 transitions. [2022-03-17 22:14:37,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 22:14:37,542 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 33 [2022-03-17 22:14:37,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 22:14:37,543 INFO L225 Difference]: With dead ends: 57 [2022-03-17 22:14:37,543 INFO L226 Difference]: Without dead ends: 55 [2022-03-17 22:14:37,544 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-17 22:14:37,545 INFO L912 BasicCegarLoop]: 40 mSDtfsCounter, 16 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 22:14:37,545 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 152 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 22:14:37,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-03-17 22:14:37,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2022-03-17 22:14:37,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 35 states have internal predecessors, (47), 14 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-17 22:14:37,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 73 transitions. [2022-03-17 22:14:37,554 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 73 transitions. Word has length 33 [2022-03-17 22:14:37,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 22:14:37,554 INFO L478 AbstractCegarLoop]: Abstraction has 53 states and 73 transitions. [2022-03-17 22:14:37,555 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-17 22:14:37,555 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 73 transitions. [2022-03-17 22:14:37,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-17 22:14:37,556 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 22:14:37,556 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 22:14:37,579 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-03-17 22:14:37,779 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 [2022-03-17 22:14:37,780 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 22:14:37,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 22:14:37,780 INFO L85 PathProgramCache]: Analyzing trace with hash -64495806, now seen corresponding path program 1 times [2022-03-17 22:14:37,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 22:14:37,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779833024] [2022-03-17 22:14:37,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 22:14:37,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 22:14:37,798 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 22:14:37,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1978140167] [2022-03-17 22:14:37,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 22:14:37,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 22:14:37,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 22:14:37,817 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) [2022-03-17 22:14:37,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process