/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/bresenham-ll_unwindbound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7390193 [2022-04-05 06:42:01,570 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-05 06:42:01,572 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-05 06:42:01,623 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-05 06:42:01,624 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-05 06:42:01,625 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-05 06:42:01,628 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-05 06:42:01,630 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-05 06:42:01,632 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-05 06:42:01,637 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-05 06:42:01,638 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-05 06:42:01,639 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-05 06:42:01,639 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-05 06:42:01,642 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-05 06:42:01,643 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-05 06:42:01,647 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-05 06:42:01,647 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-05 06:42:01,648 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-05 06:42:01,651 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-05 06:42:01,658 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-05 06:42:01,660 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-05 06:42:01,662 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-05 06:42:01,663 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-05 06:42:01,663 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-05 06:42:01,665 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-05 06:42:01,671 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-05 06:42:01,679 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-05 06:42:01,680 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-05 06:42:01,682 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-05 06:42:01,683 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-04-05 06:42:01,716 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-05 06:42:01,716 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-05 06:42:01,717 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-04-05 06:42:01,717 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-04-05 06:42:01,718 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-04-05 06:42:01,718 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-04-05 06:42:01,718 INFO L138 SettingsManager]: * Use SBE=true [2022-04-05 06:42:01,718 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-05 06:42:01,719 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-05 06:42:01,720 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-05 06:42:01,720 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-05 06:42:01,720 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-05 06:42:01,720 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-05 06:42:01,720 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-05 06:42:01,720 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-05 06:42:01,720 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-05 06:42:01,721 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-05 06:42:01,721 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-05 06:42:01,721 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-05 06:42:01,721 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 06:42:01,721 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-05 06:42:01,721 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-04-05 06:42:01,722 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-04-05 06:42:01,722 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-05 06:42:01,722 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-04-05 06:42:01,722 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-05 06:42:01,722 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-04-05 06:42:01,723 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-04-05 06:42:01,724 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-05 06:42:01,724 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-05 06:42:01,938 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-05 06:42:01,958 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-05 06:42:01,964 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-05 06:42:01,965 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-05 06:42:01,965 INFO L275 PluginConnector]: CDTParser initialized [2022-04-05 06:42:01,967 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_unwindbound50.c [2022-04-05 06:42:02,019 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/499d97a10/15da3255c5e946ab953b2412932b7416/FLAGb603b3fe0 [2022-04-05 06:42:02,430 INFO L306 CDTParser]: Found 1 translation units. [2022-04-05 06:42:02,430 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_unwindbound50.c [2022-04-05 06:42:02,438 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/499d97a10/15da3255c5e946ab953b2412932b7416/FLAGb603b3fe0 [2022-04-05 06:42:02,455 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/499d97a10/15da3255c5e946ab953b2412932b7416 [2022-04-05 06:42:02,458 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-05 06:42:02,460 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-05 06:42:02,462 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-05 06:42:02,462 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-05 06:42:02,466 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-05 06:42:02,467 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 06:42:02" (1/1) ... [2022-04-05 06:42:02,468 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2111a4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 06:42:02, skipping insertion in model container [2022-04-05 06:42:02,468 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 06:42:02" (1/1) ... [2022-04-05 06:42:02,474 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-05 06:42:02,489 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-05 06:42:02,668 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/bresenham-ll_unwindbound50.c[597,610] [2022-04-05 06:42:02,684 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 06:42:02,691 INFO L203 MainTranslator]: Completed pre-run [2022-04-05 06:42:02,706 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/bresenham-ll_unwindbound50.c[597,610] [2022-04-05 06:42:02,712 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 06:42:02,724 INFO L208 MainTranslator]: Completed translation [2022-04-05 06:42:02,725 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 06:42:02 WrapperNode [2022-04-05 06:42:02,725 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-05 06:42:02,726 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-05 06:42:02,726 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-05 06:42:02,726 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-05 06:42:02,736 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 06:42:02" (1/1) ... [2022-04-05 06:42:02,737 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 06:42:02" (1/1) ... [2022-04-05 06:42:02,742 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 06:42:02" (1/1) ... [2022-04-05 06:42:02,743 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 06:42:02" (1/1) ... [2022-04-05 06:42:02,747 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 06:42:02" (1/1) ... [2022-04-05 06:42:02,750 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 06:42:02" (1/1) ... [2022-04-05 06:42:02,751 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 06:42:02" (1/1) ... [2022-04-05 06:42:02,753 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-05 06:42:02,754 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-05 06:42:02,754 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-05 06:42:02,754 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-05 06:42:02,755 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 06:42:02" (1/1) ... [2022-04-05 06:42:02,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 06:42:02,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:42:02,797 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) [2022-04-05 06:42:02,816 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 [2022-04-05 06:42:02,838 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-05 06:42:02,838 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-05 06:42:02,839 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-05 06:42:02,839 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-05 06:42:02,840 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-05 06:42:02,840 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-05 06:42:02,840 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-05 06:42:02,841 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-05 06:42:02,843 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-05 06:42:02,843 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-05 06:42:02,843 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-05 06:42:02,843 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-05 06:42:02,844 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-05 06:42:02,844 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-05 06:42:02,844 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-05 06:42:02,844 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-05 06:42:02,848 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-05 06:42:02,848 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-05 06:42:02,848 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-05 06:42:02,848 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-05 06:42:02,905 INFO L234 CfgBuilder]: Building ICFG [2022-04-05 06:42:02,907 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-05 06:42:03,100 INFO L275 CfgBuilder]: Performing block encoding [2022-04-05 06:42:03,106 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-05 06:42:03,106 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-05 06:42:03,107 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 06:42:03 BoogieIcfgContainer [2022-04-05 06:42:03,108 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-05 06:42:03,108 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-05 06:42:03,108 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-05 06:42:03,109 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-05 06:42:03,112 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 06:42:03" (1/1) ... [2022-04-05 06:42:03,114 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-04-05 06:42:03,128 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 06:42:03 BasicIcfg [2022-04-05 06:42:03,128 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-05 06:42:03,129 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-05 06:42:03,130 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-05 06:42:03,132 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-05 06:42:03,132 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.04 06:42:02" (1/4) ... [2022-04-05 06:42:03,133 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@581286a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 06:42:03, skipping insertion in model container [2022-04-05 06:42:03,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 06:42:02" (2/4) ... [2022-04-05 06:42:03,133 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@581286a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 06:42:03, skipping insertion in model container [2022-04-05 06:42:03,134 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 06:42:03" (3/4) ... [2022-04-05 06:42:03,134 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@581286a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.04 06:42:03, skipping insertion in model container [2022-04-05 06:42:03,134 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 06:42:03" (4/4) ... [2022-04-05 06:42:03,135 INFO L111 eAbstractionObserver]: Analyzing ICFG bresenham-ll_unwindbound50.cqvasr [2022-04-05 06:42:03,139 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-04-05 06:42:03,140 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-05 06:42:03,220 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-05 06:42:03,228 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 [2022-04-05 06:42:03,228 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-05 06:42:03,253 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-05 06:42:03,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-04-05 06:42:03,257 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:42:03,257 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:42:03,258 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:42:03,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:42:03,266 INFO L85 PathProgramCache]: Analyzing trace with hash -498253564, now seen corresponding path program 1 times [2022-04-05 06:42:03,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:42:03,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638146863] [2022-04-05 06:42:03,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:42:03,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:42:03,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:42:03,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:42:03,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:42:03,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:42:03,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:42:03,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638146863] [2022-04-05 06:42:03,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638146863] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 06:42:03,422 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 06:42:03,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-05 06:42:03,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376142077] [2022-04-05 06:42:03,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 06:42:03,428 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-05 06:42:03,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:42:03,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-05 06:42:03,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-05 06:42:03,456 INFO L87 Difference]: Start difference. First operand has 25 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 06:42:03,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:42:03,509 INFO L93 Difference]: Finished difference Result 45 states and 58 transitions. [2022-04-05 06:42:03,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-05 06:42:03,511 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-04-05 06:42:03,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:42:03,518 INFO L225 Difference]: With dead ends: 45 [2022-04-05 06:42:03,518 INFO L226 Difference]: Without dead ends: 21 [2022-04-05 06:42:03,521 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-05 06:42:03,524 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 6 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 06:42:03,525 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 31 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 06:42:03,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-04-05 06:42:03,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2022-04-05 06:42:03,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-05 06:42:03,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2022-04-05 06:42:03,556 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 12 [2022-04-05 06:42:03,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:42:03,557 INFO L478 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2022-04-05 06:42:03,557 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 06:42:03,557 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2022-04-05 06:42:03,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-04-05 06:42:03,558 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:42:03,558 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:42:03,558 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-05 06:42:03,559 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:42:03,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:42:03,559 INFO L85 PathProgramCache]: Analyzing trace with hash -467747580, now seen corresponding path program 1 times [2022-04-05 06:42:03,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:42:03,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615110517] [2022-04-05 06:42:03,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:42:03,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:42:03,576 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 06:42:03,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1951952242] [2022-04-05 06:42:03,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:42:03,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:42:03,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:42:03,579 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) [2022-04-05 06:42:03,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-05 06:42:03,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:42:03,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-05 06:42:03,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:42:03,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:42:03,775 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 06:42:03,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:42:03,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615110517] [2022-04-05 06:42:03,776 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 06:42:03,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951952242] [2022-04-05 06:42:03,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951952242] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 06:42:03,777 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 06:42:03,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-05 06:42:03,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872450677] [2022-04-05 06:42:03,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 06:42:03,778 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-05 06:42:03,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:42:03,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-05 06:42:03,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-05 06:42:03,795 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 06:42:03,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:42:03,867 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2022-04-05 06:42:03,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-05 06:42:03,867 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-04-05 06:42:03,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:42:03,869 INFO L225 Difference]: With dead ends: 34 [2022-04-05 06:42:03,869 INFO L226 Difference]: Without dead ends: 29 [2022-04-05 06:42:03,869 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-04-05 06:42:03,870 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 12 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 06:42:03,871 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 64 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 06:42:03,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-04-05 06:42:03,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2022-04-05 06:42:03,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-05 06:42:03,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2022-04-05 06:42:03,878 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 12 [2022-04-05 06:42:03,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:42:03,879 INFO L478 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2022-04-05 06:42:03,879 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 06:42:03,879 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2022-04-05 06:42:03,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-04-05 06:42:03,880 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:42:03,880 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:42:03,908 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-05 06:42:04,103 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 [2022-04-05 06:42:04,104 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:42:04,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:42:04,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1909475431, now seen corresponding path program 1 times [2022-04-05 06:42:04,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:42:04,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317316161] [2022-04-05 06:42:04,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:42:04,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:42:04,119 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 06:42:04,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [482654764] [2022-04-05 06:42:04,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:42:04,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:42:04,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:42:04,121 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) [2022-04-05 06:42:04,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-05 06:42:04,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:42:04,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 17 conjunts are in the unsatisfiable core [2022-04-05 06:42:04,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:42:04,436 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:42:04,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:42:04,589 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-05 06:42:04,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:42:04,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317316161] [2022-04-05 06:42:04,590 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 06:42:04,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482654764] [2022-04-05 06:42:04,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482654764] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:42:04,592 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 06:42:04,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2022-04-05 06:42:04,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031647659] [2022-04-05 06:42:04,592 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 06:42:04,593 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-05 06:42:04,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:42:04,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-05 06:42:04,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-04-05 06:42:04,594 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 11 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 10 states have internal predecessors, (23), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-05 06:42:04,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:42:04,898 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2022-04-05 06:42:04,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-05 06:42:04,899 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 10 states have internal predecessors, (23), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 22 [2022-04-05 06:42:04,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:42:04,900 INFO L225 Difference]: With dead ends: 45 [2022-04-05 06:42:04,900 INFO L226 Difference]: Without dead ends: 38 [2022-04-05 06:42:04,901 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-04-05 06:42:04,902 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 20 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 06:42:04,902 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 92 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 06:42:04,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-04-05 06:42:04,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2022-04-05 06:42:04,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-05 06:42:04,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2022-04-05 06:42:04,917 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 22 [2022-04-05 06:42:04,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:42:04,918 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2022-04-05 06:42:04,918 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 10 states have internal predecessors, (23), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-05 06:42:04,918 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2022-04-05 06:42:04,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-05 06:42:04,920 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:42:04,920 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:42:04,947 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-05 06:42:05,141 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 [2022-04-05 06:42:05,141 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:42:05,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:42:05,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1519292561, now seen corresponding path program 1 times [2022-04-05 06:42:05,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:42:05,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966680765] [2022-04-05 06:42:05,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:42:05,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:42:05,177 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 06:42:05,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [635979345] [2022-04-05 06:42:05,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:42:05,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:42:05,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:42:05,192 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) [2022-04-05 06:42:05,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-05 06:42:05,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:42:05,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-05 06:42:05,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:42:05,317 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:42:05,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:42:05,402 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:42:05,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:42:05,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966680765] [2022-04-05 06:42:05,403 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 06:42:05,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635979345] [2022-04-05 06:42:05,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635979345] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:42:05,403 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 06:42:05,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-04-05 06:42:05,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598435086] [2022-04-05 06:42:05,404 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 06:42:05,404 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-05 06:42:05,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:42:05,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-05 06:42:05,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-04-05 06:42:05,405 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-04-05 06:42:05,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:42:05,473 INFO L93 Difference]: Finished difference Result 77 states and 85 transitions. [2022-04-05 06:42:05,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-05 06:42:05,473 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 23 [2022-04-05 06:42:05,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:42:05,475 INFO L225 Difference]: With dead ends: 77 [2022-04-05 06:42:05,475 INFO L226 Difference]: Without dead ends: 71 [2022-04-05 06:42:05,475 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-04-05 06:42:05,476 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 48 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 06:42:05,477 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 115 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 06:42:05,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-04-05 06:42:05,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 59. [2022-04-05 06:42:05,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 45 states have (on average 1.1777777777777778) internal successors, (53), 45 states have internal predecessors, (53), 8 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-05 06:42:05,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 67 transitions. [2022-04-05 06:42:05,487 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 67 transitions. Word has length 23 [2022-04-05 06:42:05,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:42:05,487 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 67 transitions. [2022-04-05 06:42:05,488 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-04-05 06:42:05,488 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 67 transitions. [2022-04-05 06:42:05,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-05 06:42:05,489 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:42:05,489 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:42:05,516 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-05 06:42:05,713 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:42:05,714 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:42:05,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:42:05,714 INFO L85 PathProgramCache]: Analyzing trace with hash -2036751370, now seen corresponding path program 1 times [2022-04-05 06:42:05,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:42:05,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10543324] [2022-04-05 06:42:05,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:42:05,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:42:05,724 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 06:42:05,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1200889942] [2022-04-05 06:42:05,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:42:05,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:42:05,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:42:05,726 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:42:05,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-05 06:42:05,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:42:05,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 26 conjunts are in the unsatisfiable core [2022-04-05 06:42:05,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:42:06,073 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-05 06:42:06,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:42:06,581 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-05 06:42:06,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:42:06,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10543324] [2022-04-05 06:42:06,581 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 06:42:06,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200889942] [2022-04-05 06:42:06,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200889942] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:42:06,582 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 06:42:06,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2022-04-05 06:42:06,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686069299] [2022-04-05 06:42:06,584 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 06:42:06,584 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-05 06:42:06,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:42:06,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-05 06:42:06,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-04-05 06:42:06,585 INFO L87 Difference]: Start difference. First operand 59 states and 67 transitions. Second operand has 22 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 19 states have internal predecessors, (33), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:42:07,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:42:07,222 INFO L93 Difference]: Finished difference Result 85 states and 98 transitions. [2022-04-05 06:42:07,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-04-05 06:42:07,222 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 19 states have internal predecessors, (33), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 29 [2022-04-05 06:42:07,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:42:07,224 INFO L225 Difference]: With dead ends: 85 [2022-04-05 06:42:07,224 INFO L226 Difference]: Without dead ends: 77 [2022-04-05 06:42:07,225 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=208, Invalid=1052, Unknown=0, NotChecked=0, Total=1260 [2022-04-05 06:42:07,225 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 44 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 06:42:07,226 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 140 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 189 Invalid, 0 Unknown, 81 Unchecked, 0.2s Time] [2022-04-05 06:42:07,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-04-05 06:42:07,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 67. [2022-04-05 06:42:07,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 52 states have (on average 1.1538461538461537) internal successors, (60), 52 states have internal predecessors, (60), 9 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-05 06:42:07,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 76 transitions. [2022-04-05 06:42:07,239 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 76 transitions. Word has length 29 [2022-04-05 06:42:07,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:42:07,240 INFO L478 AbstractCegarLoop]: Abstraction has 67 states and 76 transitions. [2022-04-05 06:42:07,240 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 19 states have internal predecessors, (33), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:42:07,240 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 76 transitions. [2022-04-05 06:42:07,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-04-05 06:42:07,241 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:42:07,241 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:42:07,271 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-05 06:42:07,466 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:42:07,466 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:42:07,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:42:07,466 INFO L85 PathProgramCache]: Analyzing trace with hash -782335822, now seen corresponding path program 1 times [2022-04-05 06:42:07,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:42:07,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214458647] [2022-04-05 06:42:07,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:42:07,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:42:07,477 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 06:42:07,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [129057688] [2022-04-05 06:42:07,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:42:07,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:42:07,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:42:07,479 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:42:07,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-05 06:42:07,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:42:07,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 28 conjunts are in the unsatisfiable core [2022-04-05 06:42:07,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:42:07,707 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-05 06:42:07,709 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-05 06:42:08,218 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-04-05 06:42:08,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:42:08,556 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-04-05 06:42:08,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:42:08,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214458647] [2022-04-05 06:42:08,556 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 06:42:08,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129057688] [2022-04-05 06:42:08,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129057688] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:42:08,557 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 06:42:08,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2022-04-05 06:42:08,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940984597] [2022-04-05 06:42:08,557 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 06:42:08,558 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-05 06:42:08,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:42:08,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-05 06:42:08,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-04-05 06:42:08,559 INFO L87 Difference]: Start difference. First operand 67 states and 76 transitions. Second operand has 18 states, 12 states have (on average 2.5) internal successors, (30), 17 states have internal predecessors, (30), 8 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-05 06:42:10,759 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 06:42:14,815 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 06:42:16,889 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 06:42:19,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:42:19,237 INFO L93 Difference]: Finished difference Result 96 states and 113 transitions. [2022-04-05 06:42:19,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-05 06:42:19,238 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 12 states have (on average 2.5) internal successors, (30), 17 states have internal predecessors, (30), 8 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) Word has length 39 [2022-04-05 06:42:19,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:42:19,239 INFO L225 Difference]: With dead ends: 96 [2022-04-05 06:42:19,239 INFO L226 Difference]: Without dead ends: 90 [2022-04-05 06:42:19,240 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=117, Invalid=433, Unknown=2, NotChecked=0, Total=552 [2022-04-05 06:42:19,240 INFO L913 BasicCegarLoop]: 16 mSDtfsCounter, 30 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 19 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2022-04-05 06:42:19,241 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 154 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 210 Invalid, 3 Unknown, 0 Unchecked, 6.2s Time] [2022-04-05 06:42:19,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-04-05 06:42:19,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 88. [2022-04-05 06:42:19,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 70 states have (on average 1.1714285714285715) internal successors, (82), 70 states have internal predecessors, (82), 12 states have call successors, (12), 7 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-05 06:42:19,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 104 transitions. [2022-04-05 06:42:19,260 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 104 transitions. Word has length 39 [2022-04-05 06:42:19,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:42:19,260 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 104 transitions. [2022-04-05 06:42:19,261 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 12 states have (on average 2.5) internal successors, (30), 17 states have internal predecessors, (30), 8 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-05 06:42:19,261 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 104 transitions. [2022-04-05 06:42:19,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-04-05 06:42:19,262 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:42:19,262 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:42:19,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-05 06:42:19,462 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:42:19,463 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:42:19,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:42:19,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1435422131, now seen corresponding path program 1 times [2022-04-05 06:42:19,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:42:19,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100136483] [2022-04-05 06:42:19,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:42:19,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:42:19,471 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 06:42:19,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1336743460] [2022-04-05 06:42:19,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:42:19,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:42:19,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:42:19,473 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:42:19,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-05 06:42:19,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:42:19,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-05 06:42:19,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:42:19,727 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-05 06:42:19,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:42:19,902 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-05 06:42:19,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:42:19,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100136483] [2022-04-05 06:42:19,902 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 06:42:19,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336743460] [2022-04-05 06:42:19,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336743460] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:42:19,903 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 06:42:19,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-04-05 06:42:19,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836615803] [2022-04-05 06:42:19,903 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 06:42:19,904 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-05 06:42:19,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:42:19,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-05 06:42:19,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-04-05 06:42:19,905 INFO L87 Difference]: Start difference. First operand 88 states and 104 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-05 06:42:20,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:42:20,074 INFO L93 Difference]: Finished difference Result 97 states and 113 transitions. [2022-04-05 06:42:20,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-05 06:42:20,075 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 39 [2022-04-05 06:42:20,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:42:20,076 INFO L225 Difference]: With dead ends: 97 [2022-04-05 06:42:20,076 INFO L226 Difference]: Without dead ends: 91 [2022-04-05 06:42:20,076 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2022-04-05 06:42:20,077 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 5 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 06:42:20,077 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 100 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 06:42:20,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-04-05 06:42:20,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 83. [2022-04-05 06:42:20,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 66 states have (on average 1.1666666666666667) internal successors, (77), 66 states have internal predecessors, (77), 11 states have call successors, (11), 7 states have call predecessors, (11), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-05 06:42:20,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 97 transitions. [2022-04-05 06:42:20,090 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 97 transitions. Word has length 39 [2022-04-05 06:42:20,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:42:20,091 INFO L478 AbstractCegarLoop]: Abstraction has 83 states and 97 transitions. [2022-04-05 06:42:20,091 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-05 06:42:20,091 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 97 transitions. [2022-04-05 06:42:20,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-04-05 06:42:20,092 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:42:20,093 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:42:20,120 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-05 06:42:20,317 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:42:20,317 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:42:20,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:42:20,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1628716144, now seen corresponding path program 2 times [2022-04-05 06:42:20,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:42:20,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427098532] [2022-04-05 06:42:20,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:42:20,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:42:20,326 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 06:42:20,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [384651291] [2022-04-05 06:42:20,326 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 06:42:20,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:42:20,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:42:20,342 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:42:20,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-05 06:42:20,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 06:42:20,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:42:20,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-05 06:42:20,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:42:20,646 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-05 06:42:20,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:42:20,847 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-05 06:42:20,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:42:20,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427098532] [2022-04-05 06:42:20,847 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 06:42:20,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384651291] [2022-04-05 06:42:20,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384651291] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:42:20,847 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 06:42:20,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-04-05 06:42:20,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113031715] [2022-04-05 06:42:20,848 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 06:42:20,848 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-05 06:42:20,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:42:20,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-05 06:42:20,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-04-05 06:42:20,849 INFO L87 Difference]: Start difference. First operand 83 states and 97 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 10 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-05 06:42:21,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:42:21,029 INFO L93 Difference]: Finished difference Result 108 states and 127 transitions. [2022-04-05 06:42:21,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-05 06:42:21,030 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 10 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 49 [2022-04-05 06:42:21,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:42:21,031 INFO L225 Difference]: With dead ends: 108 [2022-04-05 06:42:21,031 INFO L226 Difference]: Without dead ends: 102 [2022-04-05 06:42:21,031 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-04-05 06:42:21,032 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 8 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 06:42:21,032 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 131 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 06:42:21,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-04-05 06:42:21,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 89. [2022-04-05 06:42:21,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 71 states have (on average 1.1690140845070423) internal successors, (83), 71 states have internal predecessors, (83), 12 states have call successors, (12), 7 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-05 06:42:21,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 105 transitions. [2022-04-05 06:42:21,047 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 105 transitions. Word has length 49 [2022-04-05 06:42:21,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:42:21,047 INFO L478 AbstractCegarLoop]: Abstraction has 89 states and 105 transitions. [2022-04-05 06:42:21,047 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 10 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-05 06:42:21,048 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 105 transitions. [2022-04-05 06:42:21,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-04-05 06:42:21,049 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:42:21,049 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:42:21,075 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-05 06:42:21,267 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:42:21,268 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:42:21,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:42:21,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1136439088, now seen corresponding path program 3 times [2022-04-05 06:42:21,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:42:21,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536056918] [2022-04-05 06:42:21,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:42:21,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:42:21,275 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 06:42:21,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [566162618] [2022-04-05 06:42:21,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 06:42:21,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:42:21,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:42:21,278 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:42:21,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-05 06:42:21,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-04-05 06:42:21,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:42:21,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 19 conjunts are in the unsatisfiable core [2022-04-05 06:42:21,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:42:22,030 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-05 06:42:22,043 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-05 06:42:22,045 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-05 06:42:28,138 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse3 (+ c_main_~X~0 1)) (.cse2 (+ (* (- 1) c_main_~Y~0) (div (+ c_main_~v~0 c_main_~X~0) 2) (* c_main_~X~0 c_main_~y~0))) (.cse0 (= c_main_~Y~0 0)) (.cse4 (= (mod (+ (* 2 c_main_~X~0 c_main_~y~0) c_main_~v~0 c_main_~X~0) 2) 0))) (or (let ((.cse1 (div .cse2 c_main_~Y~0))) (and (not .cse0) (not (<= .cse1 c_main_~X~0)) (= (mod .cse2 c_main_~Y~0) 0) (= c_main_~xy~0 (* c_main_~y~0 .cse1)) (<= .cse1 .cse3) (= c_main_~yx~0 (* c_main_~Y~0 .cse1)) .cse4)) (and (let ((.cse6 (= c_main_~y~0 0))) (or (let ((.cse5 (div c_main_~xy~0 c_main_~y~0))) (and (<= .cse5 .cse3) (= (mod c_main_~xy~0 c_main_~y~0) 0) (not .cse6) (< c_main_~X~0 .cse5))) (and .cse6 (= c_main_~xy~0 0)))) (= 0 .cse2) .cse0 (= c_main_~yx~0 0) .cse4))) is different from false