/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/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/lcm2_unwindbound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 07:48:08,490 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 07:48:08,491 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 07:48:08,522 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-06 07:48:08,522 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-06 07:48:08,523 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-06 07:48:08,528 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-06 07:48:08,533 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-06 07:48:08,534 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-06 07:48:08,538 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-06 07:48:08,539 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-06 07:48:08,540 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-06 07:48:08,540 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-06 07:48:08,542 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-06 07:48:08,542 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-06 07:48:08,543 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-06 07:48:08,544 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-06 07:48:08,545 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-06 07:48:08,548 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-06 07:48:08,550 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-06 07:48:08,551 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-06 07:48:08,553 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-06 07:48:08,553 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-06 07:48:08,554 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-06 07:48:08,555 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-06 07:48:08,558 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-06 07:48:08,563 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 07:48:08,564 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 07:48:08,565 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 07:48:08,565 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-04-06 07:48:08,575 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 07:48:08,575 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 07:48:08,576 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 07:48:08,576 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-06 07:48:08,576 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 07:48:08,576 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-06 07:48:08,576 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 07:48:08,576 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 07:48:08,576 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 07:48:08,577 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 07:48:08,577 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-06 07:48:08,577 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 07:48:08,577 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 07:48:08,577 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 07:48:08,577 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 07:48:08,577 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 07:48:08,578 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 07:48:08,578 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 07:48:08,578 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 07:48:08,578 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 07:48:08,578 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-06 07:48:08,579 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-06 07:48:08,579 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 07:48:08,762 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 07:48:08,776 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 07:48:08,777 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 07:48:08,778 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 07:48:08,784 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 07:48:08,784 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/lcm2_unwindbound1.c [2022-04-06 07:48:08,831 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ac063f8c/a6d2e1c6cf26483e901c78555d7d637c/FLAGafe7a80b5 [2022-04-06 07:48:09,176 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 07:48:09,177 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/lcm2_unwindbound1.c [2022-04-06 07:48:09,180 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ac063f8c/a6d2e1c6cf26483e901c78555d7d637c/FLAGafe7a80b5 [2022-04-06 07:48:09,188 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ac063f8c/a6d2e1c6cf26483e901c78555d7d637c [2022-04-06 07:48:09,189 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 07:48:09,190 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-06 07:48:09,191 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 07:48:09,191 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 07:48:09,193 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 07:48:09,193 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 07:48:09" (1/1) ... [2022-04-06 07:48:09,194 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e58fcc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:48:09, skipping insertion in model container [2022-04-06 07:48:09,194 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 07:48:09" (1/1) ... [2022-04-06 07:48:09,198 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 07:48:09,206 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 07:48:09,332 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/lcm2_unwindbound1.c[537,550] [2022-04-06 07:48:09,346 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 07:48:09,351 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 07:48:09,358 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/lcm2_unwindbound1.c[537,550] [2022-04-06 07:48:09,362 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 07:48:09,370 INFO L208 MainTranslator]: Completed translation [2022-04-06 07:48:09,370 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:48:09 WrapperNode [2022-04-06 07:48:09,370 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 07:48:09,371 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 07:48:09,371 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 07:48:09,371 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 07:48:09,377 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:48:09" (1/1) ... [2022-04-06 07:48:09,377 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:48:09" (1/1) ... [2022-04-06 07:48:09,381 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:48:09" (1/1) ... [2022-04-06 07:48:09,381 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:48:09" (1/1) ... [2022-04-06 07:48:09,384 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:48:09" (1/1) ... [2022-04-06 07:48:09,386 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:48:09" (1/1) ... [2022-04-06 07:48:09,386 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:48:09" (1/1) ... [2022-04-06 07:48:09,387 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 07:48:09,388 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 07:48:09,388 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 07:48:09,388 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 07:48:09,389 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:48:09" (1/1) ... [2022-04-06 07:48:09,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 07:48:09,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 07:48:09,408 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) [2022-04-06 07:48:09,422 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 [2022-04-06 07:48:09,445 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 07:48:09,445 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 07:48:09,445 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 07:48:09,445 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 07:48:09,446 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 07:48:09,446 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 07:48:09,446 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 07:48:09,446 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 07:48:09,446 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 07:48:09,446 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 07:48:09,446 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-04-06 07:48:09,446 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 07:48:09,446 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 07:48:09,446 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 07:48:09,446 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 07:48:09,447 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 07:48:09,447 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 07:48:09,447 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 07:48:09,447 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 07:48:09,447 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 07:48:09,488 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 07:48:09,489 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 07:48:09,609 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 07:48:09,613 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 07:48:09,613 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-06 07:48:09,614 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 07:48:09 BoogieIcfgContainer [2022-04-06 07:48:09,614 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 07:48:09,614 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-06 07:48:09,615 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-06 07:48:09,620 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-06 07:48:09,622 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 07:48:09" (1/1) ... [2022-04-06 07:48:09,624 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_JORDAN [2022-04-06 07:48:09,645 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 07:48:09 BasicIcfg [2022-04-06 07:48:09,646 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-06 07:48:09,649 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 07:48:09,649 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 07:48:09,651 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 07:48:09,651 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 07:48:09" (1/4) ... [2022-04-06 07:48:09,651 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58f52d3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 07:48:09, skipping insertion in model container [2022-04-06 07:48:09,651 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:48:09" (2/4) ... [2022-04-06 07:48:09,652 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58f52d3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 07:48:09, skipping insertion in model container [2022-04-06 07:48:09,652 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 07:48:09" (3/4) ... [2022-04-06 07:48:09,653 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58f52d3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 07:48:09, skipping insertion in model container [2022-04-06 07:48:09,654 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 07:48:09" (4/4) ... [2022-04-06 07:48:09,655 INFO L111 eAbstractionObserver]: Analyzing ICFG lcm2_unwindbound1.cJordan [2022-04-06 07:48:09,658 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-04-06 07:48:09,658 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 07:48:09,693 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 07:48:09,700 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, 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 [2022-04-06 07:48:09,700 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 07:48:09,711 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 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) [2022-04-06 07:48:09,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-04-06 07:48:09,724 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 07:48:09,724 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 07:48:09,725 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 07:48:09,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 07:48:09,728 INFO L85 PathProgramCache]: Analyzing trace with hash -293305999, now seen corresponding path program 1 times [2022-04-06 07:48:09,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 07:48:09,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261841012] [2022-04-06 07:48:09,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 07:48:09,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 07:48:09,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 07:48:09,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 07:48:09,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 07:48:09,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 07:48:09,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 07:48:09,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-04-06 07:48:09,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 07:48:09,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-04-06 07:48:09,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 07:48:09,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-04-06 07:48:09,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 07:48:09,948 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 07:48:09,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 07:48:09,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261841012] [2022-04-06 07:48:09,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261841012] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 07:48:09,949 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 07:48:09,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 07:48:09,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837138637] [2022-04-06 07:48:09,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 07:48:09,953 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 07:48:09,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 07:48:09,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 07:48:09,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 07:48:09,978 INFO L87 Difference]: Start difference. First operand has 32 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 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 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) [2022-04-06 07:48:10,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 07:48:10,058 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2022-04-06 07:48:10,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 07:48:10,060 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 [2022-04-06 07:48:10,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 07:48:10,064 INFO L225 Difference]: With dead ends: 33 [2022-04-06 07:48:10,065 INFO L226 Difference]: Without dead ends: 28 [2022-04-06 07:48:10,066 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 07:48:10,070 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 07:48:10,070 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 37 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 07:48:10,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-04-06 07:48:10,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2022-04-06 07:48:10,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 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) [2022-04-06 07:48:10,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2022-04-06 07:48:10,101 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 32 [2022-04-06 07:48:10,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 07:48:10,102 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2022-04-06 07:48:10,102 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) [2022-04-06 07:48:10,102 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2022-04-06 07:48:10,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-06 07:48:10,104 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 07:48:10,104 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 07:48:10,104 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 07:48:10,105 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 07:48:10,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 07:48:10,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1648116036, now seen corresponding path program 1 times [2022-04-06 07:48:10,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 07:48:10,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904167508] [2022-04-06 07:48:10,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 07:48:10,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 07:48:10,143 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 07:48:10,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [715909088] [2022-04-06 07:48:10,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 07:48:10,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 07:48:10,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 07:48:10,146 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) [2022-04-06 07:48:10,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 07:48:10,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 07:48:10,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 07:48:10,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 07:48:10,328 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 07:48:10,329 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 07:48:10,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 07:48:10,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904167508] [2022-04-06 07:48:10,329 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 07:48:10,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715909088] [2022-04-06 07:48:10,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715909088] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 07:48:10,329 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 07:48:10,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 07:48:10,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044224842] [2022-04-06 07:48:10,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 07:48:10,331 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 07:48:10,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 07:48:10,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 07:48:10,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 07:48:10,331 INFO L87 Difference]: Start difference. First operand 27 states and 33 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) [2022-04-06 07:48:10,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 07:48:10,345 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2022-04-06 07:48:10,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 07:48:10,345 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 [2022-04-06 07:48:10,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 07:48:10,346 INFO L225 Difference]: With dead ends: 29 [2022-04-06 07:48:10,346 INFO L226 Difference]: Without dead ends: 29 [2022-04-06 07:48:10,346 INFO L912 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 [2022-04-06 07:48:10,347 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 0 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 07:48:10,347 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 75 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 07:48:10,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-04-06 07:48:10,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-04-06 07:48:10,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 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) [2022-04-06 07:48:10,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2022-04-06 07:48:10,351 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 33 [2022-04-06 07:48:10,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 07:48:10,355 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2022-04-06 07:48:10,355 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) [2022-04-06 07:48:10,356 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2022-04-06 07:48:10,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-06 07:48:10,356 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 07:48:10,356 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 07:48:10,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-06 07:48:10,557 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 [2022-04-06 07:48:10,557 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 07:48:10,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 07:48:10,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1647043560, now seen corresponding path program 1 times [2022-04-06 07:48:10,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 07:48:10,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94089774] [2022-04-06 07:48:10,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 07:48:10,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 07:48:10,570 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 07:48:10,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1501833312] [2022-04-06 07:48:10,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 07:48:10,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 07:48:10,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 07:48:10,576 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) [2022-04-06 07:48:10,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 07:48:10,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 07:48:10,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 32 conjunts are in the unsatisfiable core [2022-04-06 07:48:10,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 07:48:10,836 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 07:48:10,836 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 07:48:10,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 07:48:10,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94089774] [2022-04-06 07:48:10,836 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 07:48:10,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501833312] [2022-04-06 07:48:10,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501833312] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 07:48:10,837 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 07:48:10,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 07:48:10,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727268026] [2022-04-06 07:48:10,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 07:48:10,837 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 07:48:10,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 07:48:10,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 07:48:10,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 07:48:10,838 INFO L87 Difference]: Start difference. First operand 29 states and 35 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) [2022-04-06 07:48:10,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 07:48:10,887 INFO L93 Difference]: Finished difference Result 37 states and 45 transitions. [2022-04-06 07:48:10,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 07:48:10,887 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 [2022-04-06 07:48:10,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 07:48:10,888 INFO L225 Difference]: With dead ends: 37 [2022-04-06 07:48:10,888 INFO L226 Difference]: Without dead ends: 36 [2022-04-06 07:48:10,888 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 07:48:10,889 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 7 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 07:48:10,889 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 96 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 07:48:10,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-04-06 07:48:10,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2022-04-06 07:48:10,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-06 07:48:10,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2022-04-06 07:48:10,893 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 33 [2022-04-06 07:48:10,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 07:48:10,894 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2022-04-06 07:48:10,894 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) [2022-04-06 07:48:10,894 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2022-04-06 07:48:10,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-04-06 07:48:10,895 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 07:48:10,895 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 07:48:10,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-06 07:48:11,111 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 [2022-04-06 07:48:11,111 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 07:48:11,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 07:48:11,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1112374504, now seen corresponding path program 1 times [2022-04-06 07:48:11,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 07:48:11,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008912757] [2022-04-06 07:48:11,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 07:48:11,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 07:48:11,123 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 07:48:11,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [145499896] [2022-04-06 07:48:11,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 07:48:11,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 07:48:11,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 07:48:11,128 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) [2022-04-06 07:48:11,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process