/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/egcd-ll_unwindbound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 10:07:20,780 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 10:07:20,781 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 10:07:20,819 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-20 10:07:20,820 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-20 10:07:20,821 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-20 10:07:20,823 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-20 10:07:20,828 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-20 10:07:20,829 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-20 10:07:20,834 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-20 10:07:20,834 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-20 10:07:20,835 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-20 10:07:20,835 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 10:07:20,835 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 10:07:20,836 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 10:07:20,836 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 10:07:20,837 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 10:07:20,837 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 10:07:20,838 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 10:07:20,839 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 10:07:20,840 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 10:07:20,841 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 10:07:20,841 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 10:07:20,842 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 10:07:20,842 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 10:07:20,844 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-03-20 10:07:20,844 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-03-20 10:07:20,844 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-03-20 10:07:20,845 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-03-20 10:07:20,845 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-03-20 10:07:20,845 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2022-03-20 10:07:20,849 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 10:07:20,849 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 10:07:20,850 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 10:07:20,851 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-03-20 10:07:20,884 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 10:07:20,885 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 10:07:20,887 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-20 10:07:20,887 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-20 10:07:20,888 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-20 10:07:20,888 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-20 10:07:20,888 INFO L138 SettingsManager]: * Use SBE=true [2022-03-20 10:07:20,889 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 10:07:20,889 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 10:07:20,889 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 10:07:20,890 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 10:07:20,890 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 10:07:20,890 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 10:07:20,890 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 10:07:20,890 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 10:07:20,890 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 10:07:20,890 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 10:07:20,890 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 10:07:20,890 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 10:07:20,890 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 10:07:20,890 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 10:07:20,891 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-20 10:07:20,891 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-20 10:07:20,891 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 10:07:20,891 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-20 10:07:20,891 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 10:07:20,891 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-20 10:07:20,891 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-20 10:07:20,892 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-20 10:07:20,892 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 10:07:21,088 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 10:07:21,127 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 10:07:21,129 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 10:07:21,129 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 10:07:21,132 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 10:07:21,133 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_unwindbound2.c [2022-03-20 10:07:21,185 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/10ea9a7d1/43d006639dd644fd80aabd2ea90476fd/FLAG1270323e6 [2022-03-20 10:07:21,527 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 10:07:21,528 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_unwindbound2.c [2022-03-20 10:07:21,533 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/10ea9a7d1/43d006639dd644fd80aabd2ea90476fd/FLAG1270323e6 [2022-03-20 10:07:21,545 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/10ea9a7d1/43d006639dd644fd80aabd2ea90476fd [2022-03-20 10:07:21,547 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 10:07:21,548 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-20 10:07:21,549 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 10:07:21,549 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 10:07:21,552 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 10:07:21,552 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 10:07:21" (1/1) ... [2022-03-20 10:07:21,553 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f75900d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:07:21, skipping insertion in model container [2022-03-20 10:07:21,553 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 10:07:21" (1/1) ... [2022-03-20 10:07:21,558 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 10:07:21,568 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 10:07:21,699 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/egcd-ll_unwindbound2.c[489,502] [2022-03-20 10:07:21,713 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 10:07:21,719 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 10:07:21,726 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/egcd-ll_unwindbound2.c[489,502] [2022-03-20 10:07:21,731 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 10:07:21,740 INFO L208 MainTranslator]: Completed translation [2022-03-20 10:07:21,740 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:07:21 WrapperNode [2022-03-20 10:07:21,740 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 10:07:21,741 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 10:07:21,741 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 10:07:21,741 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 10:07:21,748 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:07:21" (1/1) ... [2022-03-20 10:07:21,748 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:07:21" (1/1) ... [2022-03-20 10:07:21,753 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:07:21" (1/1) ... [2022-03-20 10:07:21,753 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:07:21" (1/1) ... [2022-03-20 10:07:21,756 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:07:21" (1/1) ... [2022-03-20 10:07:21,759 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:07:21" (1/1) ... [2022-03-20 10:07:21,760 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:07:21" (1/1) ... [2022-03-20 10:07:21,761 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 10:07:21,761 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 10:07:21,761 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 10:07:21,761 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 10:07:21,763 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:07:21" (1/1) ... [2022-03-20 10:07:21,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 10:07:21,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:07:21,786 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-20 10:07:21,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-20 10:07:21,814 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 10:07:21,814 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 10:07:21,814 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 10:07:21,814 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 10:07:21,815 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 10:07:21,815 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 10:07:21,815 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 10:07:21,816 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 10:07:21,816 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 10:07:21,816 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 10:07:21,816 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 10:07:21,816 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 10:07:21,816 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 10:07:21,816 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 10:07:21,816 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 10:07:21,817 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 10:07:21,817 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 10:07:21,817 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 10:07:21,817 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 10:07:21,817 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 10:07:21,866 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 10:07:21,867 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 10:07:21,979 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 10:07:21,984 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 10:07:21,997 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-20 10:07:22,001 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 10:07:22 BoogieIcfgContainer [2022-03-20 10:07:22,001 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 10:07:22,001 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-20 10:07:22,002 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-20 10:07:22,002 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-20 10:07:22,005 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 10:07:22" (1/1) ... [2022-03-20 10:07:22,007 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-03-20 10:07:22,027 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 10:07:22 BasicIcfg [2022-03-20 10:07:22,027 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-20 10:07:22,028 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 10:07:22,028 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 10:07:22,034 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 10:07:22,034 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 10:07:21" (1/4) ... [2022-03-20 10:07:22,034 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c6cf87a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 10:07:22, skipping insertion in model container [2022-03-20 10:07:22,035 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:07:21" (2/4) ... [2022-03-20 10:07:22,035 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c6cf87a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 10:07:22, skipping insertion in model container [2022-03-20 10:07:22,035 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 10:07:22" (3/4) ... [2022-03-20 10:07:22,035 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c6cf87a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 10:07:22, skipping insertion in model container [2022-03-20 10:07:22,035 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 10:07:22" (4/4) ... [2022-03-20 10:07:22,036 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd-ll_unwindbound2.cqvasr [2022-03-20 10:07:22,041 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-20 10:07:22,041 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 10:07:22,074 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 10:07:22,079 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-20 10:07:22,079 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 10:07:22,091 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-20 10:07:22,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-20 10:07:22,094 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:07:22,094 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:07:22,095 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:07:22,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:07:22,099 INFO L85 PathProgramCache]: Analyzing trace with hash 2051628946, now seen corresponding path program 1 times [2022-03-20 10:07:22,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:07:22,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466163622] [2022-03-20 10:07:22,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:07:22,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:07:22,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:07:22,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 10:07:22,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:07:22,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 10:07:22,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:07:22,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 10:07:22,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:07:22,284 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 10:07:22,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:07:22,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466163622] [2022-03-20 10:07:22,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466163622] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 10:07:22,286 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 10:07:22,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 10:07:22,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535903633] [2022-03-20 10:07:22,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 10:07:22,292 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 10:07:22,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:07:22,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 10:07:22,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 10:07:22,318 INFO L87 Difference]: Start difference. First operand has 35 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 10:07:22,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:07:22,422 INFO L93 Difference]: Finished difference Result 64 states and 97 transitions. [2022-03-20 10:07:22,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 10:07:22,424 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 22 [2022-03-20 10:07:22,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:07:22,434 INFO L225 Difference]: With dead ends: 64 [2022-03-20 10:07:22,435 INFO L226 Difference]: Without dead ends: 31 [2022-03-20 10:07:22,438 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 10:07:22,442 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 10:07:22,443 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 45 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 10:07:22,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-03-20 10:07:22,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2022-03-20 10:07:22,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 10:07:22,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2022-03-20 10:07:22,471 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 22 [2022-03-20 10:07:22,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:07:22,472 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2022-03-20 10:07:22,472 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 10:07:22,472 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2022-03-20 10:07:22,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-20 10:07:22,473 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:07:22,473 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:07:22,474 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 10:07:22,474 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:07:22,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:07:22,475 INFO L85 PathProgramCache]: Analyzing trace with hash -794581502, now seen corresponding path program 1 times [2022-03-20 10:07:22,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:07:22,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900504156] [2022-03-20 10:07:22,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:07:22,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:07:22,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:07:22,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 10:07:22,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:07:22,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 10:07:22,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:07:22,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 10:07:22,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:07:22,547 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 10:07:22,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:07:22,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900504156] [2022-03-20 10:07:22,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900504156] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 10:07:22,547 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 10:07:22,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 10:07:22,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868110478] [2022-03-20 10:07:22,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 10:07:22,549 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 10:07:22,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:07:22,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 10:07:22,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 10:07:22,550 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 10:07:22,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:07:22,641 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2022-03-20 10:07:22,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 10:07:22,641 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-03-20 10:07:22,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:07:22,642 INFO L225 Difference]: With dead ends: 42 [2022-03-20 10:07:22,642 INFO L226 Difference]: Without dead ends: 32 [2022-03-20 10:07:22,643 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 10:07:22,644 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 13 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 10:07:22,644 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 65 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 10:07:22,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-03-20 10:07:22,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-03-20 10:07:22,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 10:07:22,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2022-03-20 10:07:22,650 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 23 [2022-03-20 10:07:22,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:07:22,650 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2022-03-20 10:07:22,651 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 10:07:22,651 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2022-03-20 10:07:22,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-20 10:07:22,651 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:07:22,651 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:07:22,652 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 10:07:22,652 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:07:22,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:07:22,652 INFO L85 PathProgramCache]: Analyzing trace with hash -793509026, now seen corresponding path program 1 times [2022-03-20 10:07:22,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:07:22,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916759863] [2022-03-20 10:07:22,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:07:22,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:07:22,667 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:07:22,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1738724740] [2022-03-20 10:07:22,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:07:22,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:07:22,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:07:22,670 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 10:07:22,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 10:07:22,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:07:22,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 10:07:22,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:07:22,815 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 10:07:22,815 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 10:07:22,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:07:22,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916759863] [2022-03-20 10:07:22,816 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:07:22,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738724740] [2022-03-20 10:07:22,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738724740] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 10:07:22,816 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 10:07:22,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 10:07:22,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571307119] [2022-03-20 10:07:22,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 10:07:22,817 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 10:07:22,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:07:22,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 10:07:22,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 10:07:22,818 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 10:07:22,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:07:22,858 INFO L93 Difference]: Finished difference Result 49 states and 66 transitions. [2022-03-20 10:07:22,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 10:07:22,858 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2022-03-20 10:07:22,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:07:22,859 INFO L225 Difference]: With dead ends: 49 [2022-03-20 10:07:22,859 INFO L226 Difference]: Without dead ends: 47 [2022-03-20 10:07:22,859 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 10:07:22,860 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 8 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 10:07:22,861 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 152 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 10:07:22,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-03-20 10:07:22,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2022-03-20 10:07:22,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 26 states have internal predecessors, (31), 17 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-20 10:07:22,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 63 transitions. [2022-03-20 10:07:22,869 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 63 transitions. Word has length 23 [2022-03-20 10:07:22,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:07:22,869 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 63 transitions. [2022-03-20 10:07:22,869 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 10:07:22,870 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 63 transitions. [2022-03-20 10:07:22,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-20 10:07:22,870 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:07:22,870 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:07:22,892 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 10:07:23,071 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:07:23,071 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:07:23,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:07:23,072 INFO L85 PathProgramCache]: Analyzing trace with hash 2115229340, now seen corresponding path program 1 times [2022-03-20 10:07:23,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:07:23,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749087757] [2022-03-20 10:07:23,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:07:23,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:07:23,082 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:07:23,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [649684360] [2022-03-20 10:07:23,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:07:23,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:07:23,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:07:23,084 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 10:07:23,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 10:07:23,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:07:23,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-20 10:07:23,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:07:23,285 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 10:07:23,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 10:07:23,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:07:23,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749087757] [2022-03-20 10:07:23,370 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:07:23,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649684360] [2022-03-20 10:07:23,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649684360] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 10:07:23,374 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 10:07:23,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2022-03-20 10:07:23,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925204874] [2022-03-20 10:07:23,375 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 10:07:23,377 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 10:07:23,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:07:23,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 10:07:23,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-20 10:07:23,378 INFO L87 Difference]: Start difference. First operand 46 states and 63 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-20 10:07:23,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:07:23,489 INFO L93 Difference]: Finished difference Result 53 states and 69 transitions. [2022-03-20 10:07:23,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 10:07:23,489 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 28 [2022-03-20 10:07:23,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:07:23,491 INFO L225 Difference]: With dead ends: 53 [2022-03-20 10:07:23,491 INFO L226 Difference]: Without dead ends: 51 [2022-03-20 10:07:23,492 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-03-20 10:07:23,492 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 21 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 10:07:23,493 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 222 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 10:07:23,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-03-20 10:07:23,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2022-03-20 10:07:23,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 29 states have internal predecessors, (34), 17 states have call successors, (17), 6 states have call predecessors, (17), 5 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-20 10:07:23,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 66 transitions. [2022-03-20 10:07:23,500 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 66 transitions. Word has length 28 [2022-03-20 10:07:23,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:07:23,501 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 66 transitions. [2022-03-20 10:07:23,501 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-20 10:07:23,501 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 66 transitions. [2022-03-20 10:07:23,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-20 10:07:23,502 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:07:23,502 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:07:23,525 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 10:07:23,727 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,SelfDestructingSolverStorable3 [2022-03-20 10:07:23,728 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:07:23,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:07:23,728 INFO L85 PathProgramCache]: Analyzing trace with hash -864241798, now seen corresponding path program 1 times [2022-03-20 10:07:23,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:07:23,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391547001] [2022-03-20 10:07:23,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:07:23,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:07:23,744 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:07:23,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2019601129] [2022-03-20 10:07:23,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:07:23,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:07:23,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:07:23,751 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 10:07:23,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 10:07:23,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:07:23,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-20 10:07:23,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:07:23,919 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-20 10:07:23,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 10:07:24,003 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-20 10:07:24,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:07:24,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391547001] [2022-03-20 10:07:24,004 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:07:24,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019601129] [2022-03-20 10:07:24,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019601129] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 10:07:24,004 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 10:07:24,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2022-03-20 10:07:24,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304237233] [2022-03-20 10:07:24,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 10:07:24,005 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 10:07:24,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:07:24,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 10:07:24,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-20 10:07:24,006 INFO L87 Difference]: Start difference. First operand 50 states and 66 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 10:07:24,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:07:24,054 INFO L93 Difference]: Finished difference Result 75 states and 107 transitions. [2022-03-20 10:07:24,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 10:07:24,055 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2022-03-20 10:07:24,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:07:24,057 INFO L225 Difference]: With dead ends: 75 [2022-03-20 10:07:24,057 INFO L226 Difference]: Without dead ends: 71 [2022-03-20 10:07:24,057 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-03-20 10:07:24,058 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 9 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 10:07:24,058 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 144 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 10:07:24,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-03-20 10:07:24,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2022-03-20 10:07:24,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 36 states have (on average 1.3333333333333333) internal successors, (48), 40 states have internal predecessors, (48), 28 states have call successors, (28), 7 states have call predecessors, (28), 6 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2022-03-20 10:07:24,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 100 transitions. [2022-03-20 10:07:24,069 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 100 transitions. Word has length 33 [2022-03-20 10:07:24,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:07:24,070 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 100 transitions. [2022-03-20 10:07:24,070 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 10:07:24,070 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 100 transitions. [2022-03-20 10:07:24,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-20 10:07:24,070 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:07:24,071 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:07:24,093 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 10:07:24,287 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:07:24,288 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:07:24,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:07:24,288 INFO L85 PathProgramCache]: Analyzing trace with hash -120478471, now seen corresponding path program 1 times [2022-03-20 10:07:24,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:07:24,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273092561] [2022-03-20 10:07:24,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:07:24,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:07:24,296 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:07:24,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [663203343] [2022-03-20 10:07:24,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:07:24,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:07:24,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:07:24,299 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 10:07:24,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 10:07:24,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:07:24,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-20 10:07:24,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:07:24,383 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-20 10:07:24,383 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 10:07:24,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:07:24,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273092561] [2022-03-20 10:07:24,384 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:07:24,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663203343] [2022-03-20 10:07:24,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663203343] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 10:07:24,384 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 10:07:24,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 10:07:24,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633961516] [2022-03-20 10:07:24,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 10:07:24,385 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 10:07:24,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:07:24,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 10:07:24,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 10:07:24,386 INFO L87 Difference]: Start difference. First operand 71 states and 100 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-03-20 10:07:24,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:07:24,420 INFO L93 Difference]: Finished difference Result 87 states and 123 transitions. [2022-03-20 10:07:24,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 10:07:24,421 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 39 [2022-03-20 10:07:24,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:07:24,425 INFO L225 Difference]: With dead ends: 87 [2022-03-20 10:07:24,425 INFO L226 Difference]: Without dead ends: 85 [2022-03-20 10:07:24,425 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 10:07:24,427 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 5 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 10:07:24,428 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 153 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 10:07:24,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-03-20 10:07:24,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 78. [2022-03-20 10:07:24,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 39 states have (on average 1.3076923076923077) internal successors, (51), 46 states have internal predecessors, (51), 31 states have call successors, (31), 8 states have call predecessors, (31), 7 states have return successors, (27), 23 states have call predecessors, (27), 27 states have call successors, (27) [2022-03-20 10:07:24,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 109 transitions. [2022-03-20 10:07:24,453 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 109 transitions. Word has length 39 [2022-03-20 10:07:24,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:07:24,453 INFO L478 AbstractCegarLoop]: Abstraction has 78 states and 109 transitions. [2022-03-20 10:07:24,453 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-03-20 10:07:24,453 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 109 transitions. [2022-03-20 10:07:24,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-20 10:07:24,454 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:07:24,454 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:07:24,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 10:07:24,656 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:07:24,656 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:07:24,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:07:24,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1628466672, now seen corresponding path program 1 times [2022-03-20 10:07:24,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:07:24,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082847186] [2022-03-20 10:07:24,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:07:24,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:07:24,664 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:07:24,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [523017030] [2022-03-20 10:07:24,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:07:24,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:07:24,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:07:24,666 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 10:07:24,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 10:07:24,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:07:24,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 10:07:24,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:07:24,772 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-20 10:07:24,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 10:07:24,853 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-20 10:07:24,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:07:24,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082847186] [2022-03-20 10:07:24,854 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:07:24,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523017030] [2022-03-20 10:07:24,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523017030] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 10:07:24,855 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 10:07:24,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2022-03-20 10:07:24,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690085465] [2022-03-20 10:07:24,855 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 10:07:24,855 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 10:07:24,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:07:24,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 10:07:24,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-20 10:07:24,856 INFO L87 Difference]: Start difference. First operand 78 states and 109 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 4 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2022-03-20 10:07:24,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:07:24,903 INFO L93 Difference]: Finished difference Result 121 states and 152 transitions. [2022-03-20 10:07:24,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 10:07:24,905 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 4 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) Word has length 42 [2022-03-20 10:07:24,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:07:24,906 INFO L225 Difference]: With dead ends: 121 [2022-03-20 10:07:24,906 INFO L226 Difference]: Without dead ends: 102 [2022-03-20 10:07:24,907 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-20 10:07:24,909 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 13 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 10:07:24,909 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 130 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 10:07:24,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-03-20 10:07:24,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 100. [2022-03-20 10:07:24,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 57 states have (on average 1.2105263157894737) internal successors, (69), 63 states have internal predecessors, (69), 31 states have call successors, (31), 13 states have call predecessors, (31), 11 states have return successors, (27), 23 states have call predecessors, (27), 27 states have call successors, (27) [2022-03-20 10:07:24,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 127 transitions. [2022-03-20 10:07:24,930 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 127 transitions. Word has length 42 [2022-03-20 10:07:24,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:07:24,931 INFO L478 AbstractCegarLoop]: Abstraction has 100 states and 127 transitions. [2022-03-20 10:07:24,931 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 4 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2022-03-20 10:07:24,931 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 127 transitions. [2022-03-20 10:07:24,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-20 10:07:24,934 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:07:24,934 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:07:24,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-20 10:07:25,155 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:07:25,156 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:07:25,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:07:25,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1627394196, now seen corresponding path program 1 times [2022-03-20 10:07:25,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:07:25,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791711978] [2022-03-20 10:07:25,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:07:25,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:07:25,188 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:07:25,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [725572458] [2022-03-20 10:07:25,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:07:25,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:07:25,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:07:25,193 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 10:07:25,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 10:07:25,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:07:25,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-20 10:07:25,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:07:25,372 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-03-20 10:07:25,372 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 10:07:25,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:07:25,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791711978] [2022-03-20 10:07:25,373 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:07:25,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725572458] [2022-03-20 10:07:25,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725572458] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 10:07:25,373 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 10:07:25,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 10:07:25,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650052914] [2022-03-20 10:07:25,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 10:07:25,375 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 10:07:25,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:07:25,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 10:07:25,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 10:07:25,375 INFO L87 Difference]: Start difference. First operand 100 states and 127 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-20 10:07:25,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:07:25,409 INFO L93 Difference]: Finished difference Result 106 states and 132 transitions. [2022-03-20 10:07:25,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 10:07:25,410 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 42 [2022-03-20 10:07:25,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:07:25,413 INFO L225 Difference]: With dead ends: 106 [2022-03-20 10:07:25,413 INFO L226 Difference]: Without dead ends: 103 [2022-03-20 10:07:25,413 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 10:07:25,414 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 7 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 10:07:25,414 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 143 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 10:07:25,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-03-20 10:07:25,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2022-03-20 10:07:25,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 60 states have (on average 1.2) internal successors, (72), 66 states have internal predecessors, (72), 30 states have call successors, (30), 14 states have call predecessors, (30), 12 states have return successors, (26), 22 states have call predecessors, (26), 26 states have call successors, (26) [2022-03-20 10:07:25,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 128 transitions. [2022-03-20 10:07:25,430 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 128 transitions. Word has length 42 [2022-03-20 10:07:25,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:07:25,432 INFO L478 AbstractCegarLoop]: Abstraction has 103 states and 128 transitions. [2022-03-20 10:07:25,432 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-20 10:07:25,432 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 128 transitions. [2022-03-20 10:07:25,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-20 10:07:25,434 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:07:25,434 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:07:25,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-20 10:07:25,653 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:07:25,653 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:07:25,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:07:25,654 INFO L85 PathProgramCache]: Analyzing trace with hash -1527150038, now seen corresponding path program 1 times [2022-03-20 10:07:25,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:07:25,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197610305] [2022-03-20 10:07:25,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:07:25,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:07:25,661 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:07:25,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [973540967] [2022-03-20 10:07:25,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:07:25,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:07:25,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:07:25,662 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 10:07:25,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 10:07:25,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:07:25,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-20 10:07:25,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:07:25,778 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-03-20 10:07:25,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 10:07:25,880 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-03-20 10:07:25,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:07:25,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197610305] [2022-03-20 10:07:25,881 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:07:25,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973540967] [2022-03-20 10:07:25,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973540967] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 10:07:25,881 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 10:07:25,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-03-20 10:07:25,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214175972] [2022-03-20 10:07:25,882 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 10:07:25,882 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 10:07:25,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:07:25,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 10:07:25,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-03-20 10:07:25,882 INFO L87 Difference]: Start difference. First operand 103 states and 128 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-20 10:07:25,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:07:25,982 INFO L93 Difference]: Finished difference Result 118 states and 148 transitions. [2022-03-20 10:07:25,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 10:07:25,983 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 44 [2022-03-20 10:07:25,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:07:25,984 INFO L225 Difference]: With dead ends: 118 [2022-03-20 10:07:25,984 INFO L226 Difference]: Without dead ends: 106 [2022-03-20 10:07:25,984 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-03-20 10:07:25,985 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 20 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 10:07:25,985 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 147 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 10:07:25,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-03-20 10:07:25,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 104. [2022-03-20 10:07:25,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 67 states have internal predecessors, (71), 31 states have call successors, (31), 13 states have call predecessors, (31), 12 states have return successors, (28), 23 states have call predecessors, (28), 28 states have call successors, (28) [2022-03-20 10:07:25,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 130 transitions. [2022-03-20 10:07:25,992 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 130 transitions. Word has length 44 [2022-03-20 10:07:25,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:07:25,992 INFO L478 AbstractCegarLoop]: Abstraction has 104 states and 130 transitions. [2022-03-20 10:07:25,992 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-20 10:07:25,992 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 130 transitions. [2022-03-20 10:07:25,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-20 10:07:25,993 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:07:25,993 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:07:26,015 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-20 10:07:26,210 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:07:26,211 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:07:26,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:07:26,211 INFO L85 PathProgramCache]: Analyzing trace with hash -1237367986, now seen corresponding path program 2 times [2022-03-20 10:07:26,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:07:26,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901017138] [2022-03-20 10:07:26,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:07:26,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:07:26,218 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:07:26,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [419271556] [2022-03-20 10:07:26,218 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 10:07:26,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:07:26,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:07:26,219 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 10:07:26,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-20 10:07:26,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 10:07:26,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 10:07:26,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-20 10:07:26,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:07:26,427 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-20 10:07:26,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 10:07:26,512 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-20 10:07:26,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:07:26,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901017138] [2022-03-20 10:07:26,513 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:07:26,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419271556] [2022-03-20 10:07:26,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419271556] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 10:07:26,513 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 10:07:26,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-03-20 10:07:26,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642666415] [2022-03-20 10:07:26,513 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 10:07:26,514 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 10:07:26,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:07:26,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 10:07:26,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-03-20 10:07:26,514 INFO L87 Difference]: Start difference. First operand 104 states and 130 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 5 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-03-20 10:07:26,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:07:26,990 INFO L93 Difference]: Finished difference Result 131 states and 169 transitions. [2022-03-20 10:07:26,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 10:07:26,991 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 5 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 47 [2022-03-20 10:07:26,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:07:26,992 INFO L225 Difference]: With dead ends: 131 [2022-03-20 10:07:26,992 INFO L226 Difference]: Without dead ends: 124 [2022-03-20 10:07:26,993 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-03-20 10:07:26,993 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 15 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 10:07:26,993 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 178 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 10:07:26,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-03-20 10:07:27,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 108. [2022-03-20 10:07:27,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 66 states have (on average 1.1515151515151516) internal successors, (76), 72 states have internal predecessors, (76), 27 states have call successors, (27), 15 states have call predecessors, (27), 14 states have return successors, (23), 20 states have call predecessors, (23), 23 states have call successors, (23) [2022-03-20 10:07:27,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 126 transitions. [2022-03-20 10:07:27,003 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 126 transitions. Word has length 47 [2022-03-20 10:07:27,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:07:27,003 INFO L478 AbstractCegarLoop]: Abstraction has 108 states and 126 transitions. [2022-03-20 10:07:27,003 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 5 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-03-20 10:07:27,003 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 126 transitions. [2022-03-20 10:07:27,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-20 10:07:27,004 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:07:27,004 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:07:27,026 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-20 10:07:27,207 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-20 10:07:27,208 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:07:27,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:07:27,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1153573054, now seen corresponding path program 2 times [2022-03-20 10:07:27,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:07:27,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915813266] [2022-03-20 10:07:27,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:07:27,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:07:27,215 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:07:27,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1728049769] [2022-03-20 10:07:27,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 10:07:27,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:07:27,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:07:27,217 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 10:07:27,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-20 10:07:27,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 10:07:27,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2022-03-20 10:07:27,304 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 10:07:27,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 10:07:27,342 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 10:07:27,343 INFO L618 BasicCegarLoop]: Counterexample is feasible [2022-03-20 10:07:27,343 INFO L788 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-20 10:07:27,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-20 10:07:27,574 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:07:27,577 INFO L719 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:07:27,579 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-20 10:07:27,604 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 10:07:27 BasicIcfg [2022-03-20 10:07:27,604 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-20 10:07:27,605 INFO L158 Benchmark]: Toolchain (without parser) took 6056.29ms. Allocated memory was 188.7MB in the beginning and 226.5MB in the end (delta: 37.7MB). Free memory was 137.0MB in the beginning and 193.7MB in the end (delta: -56.7MB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-20 10:07:27,605 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 188.7MB. Free memory is still 153.1MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-20 10:07:27,605 INFO L158 Benchmark]: CACSL2BoogieTranslator took 191.19ms. Allocated memory is still 188.7MB. Free memory was 136.7MB in the beginning and 163.6MB in the end (delta: -26.9MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-03-20 10:07:27,605 INFO L158 Benchmark]: Boogie Preprocessor took 19.61ms. Allocated memory is still 188.7MB. Free memory was 163.6MB in the beginning and 162.3MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-20 10:07:27,606 INFO L158 Benchmark]: RCFGBuilder took 239.72ms. Allocated memory is still 188.7MB. Free memory was 162.3MB in the beginning and 151.5MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-03-20 10:07:27,606 INFO L158 Benchmark]: IcfgTransformer took 25.51ms. Allocated memory is still 188.7MB. Free memory was 151.5MB in the beginning and 150.0MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-20 10:07:27,606 INFO L158 Benchmark]: TraceAbstraction took 5576.01ms. Allocated memory was 188.7MB in the beginning and 226.5MB in the end (delta: 37.7MB). Free memory was 149.7MB in the beginning and 193.7MB in the end (delta: -44.0MB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-20 10:07:27,607 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 188.7MB. Free memory is still 153.1MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 191.19ms. Allocated memory is still 188.7MB. Free memory was 136.7MB in the beginning and 163.6MB in the end (delta: -26.9MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 19.61ms. Allocated memory is still 188.7MB. Free memory was 163.6MB in the beginning and 162.3MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 239.72ms. Allocated memory is still 188.7MB. Free memory was 162.3MB in the beginning and 151.5MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * IcfgTransformer took 25.51ms. Allocated memory is still 188.7MB. Free memory was 151.5MB in the beginning and 150.0MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * TraceAbstraction took 5576.01ms. Allocated memory was 188.7MB in the beginning and 226.5MB in the end (delta: 37.7MB). Free memory was 149.7MB in the beginning and 193.7MB in the end (delta: -44.0MB). There was no memory consumed. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 13]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L18] int counter = 0; VAL [\old(counter)=5, counter=0] [L20] long long a, b, p, q, r, s; [L21] int x, y; [L22] x = __VERIFIER_nondet_int() [L23] y = __VERIFIER_nondet_int() [L24] CALL assume_abort_if_not(x >= 1) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L8] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L24] RET assume_abort_if_not(x >= 1) VAL [\old(counter)=0, counter=0, x=4, y=1] [L25] CALL assume_abort_if_not(y >= 1) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L8] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L25] RET assume_abort_if_not(y >= 1) VAL [\old(counter)=0, counter=0, x=4, y=1] [L27] a = x [L28] b = y [L29] p = 1 [L30] q = 0 [L31] r = 0 [L32] s = 1 VAL [\old(counter)=0, a=4, b=1, counter=0, p=1, q=0, r=0, s=1, x=4, y=1] [L34] EXPR counter++ VAL [\old(counter)=0, a=4, b=1, counter=1, counter++=0, p=1, q=0, r=0, s=1, x=4, y=1] [L34] COND TRUE counter++<2 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [\old(counter)=0, a=4, b=1, counter=1, p=1, q=0, r=0, s=1, x=4, y=1] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [\old(counter)=0, a=4, b=1, counter=1, p=1, q=0, r=0, s=1, x=4, y=1] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [\old(counter)=0, a=4, b=1, counter=1, p=1, q=0, r=0, s=1, x=4, y=1] [L39] COND FALSE !(!(a != b)) VAL [\old(counter)=0, a=4, b=1, counter=1, p=1, q=0, r=0, s=1, x=4, y=1] [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s VAL [\old(counter)=0, a=3, b=1, counter=1, p=1, q=0, r=-1, s=1, x=4, y=1] [L34] EXPR counter++ VAL [\old(counter)=0, a=3, b=1, counter=2, counter++=1, p=1, q=0, r=-1, s=1, x=4, y=1] [L34] COND TRUE counter++<2 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [\old(counter)=0, a=3, b=1, counter=2, p=1, q=0, r=-1, s=1, x=4, y=1] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [\old(counter)=0, a=3, b=1, counter=2, p=1, q=0, r=-1, s=1, x=4, y=1] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [\old(counter)=0, a=3, b=1, counter=2, p=1, q=0, r=-1, s=1, x=4, y=1] [L39] COND FALSE !(!(a != b)) VAL [\old(counter)=0, a=3, b=1, counter=2, p=1, q=0, r=-1, s=1, x=4, y=1] [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s VAL [\old(counter)=0, a=2, b=1, counter=2, p=1, q=0, r=-2, s=1, x=4, y=1] [L34] EXPR counter++ VAL [\old(counter)=0, a=2, b=1, counter=3, counter++=2, p=1, q=0, r=-2, s=1, x=4, y=1] [L34] COND FALSE !(counter++<2) [L53] CALL __VERIFIER_assert(a - b == 0) VAL [\old(cond)=0, \old(counter)=0, counter=3] [L11] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=3] [L13] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=3] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 35 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 5.5s, OverallIterations: 11, TraceHistogramMax: 7, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 152 SdHoareTripleChecker+Valid, 0.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 121 mSDsluCounter, 1379 SdHoareTripleChecker+Invalid, 0.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 983 mSDsCounter, 90 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 511 IncrementalHoareTripleChecker+Invalid, 601 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 90 mSolverCounterUnsat, 396 mSDtfsCounter, 511 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 494 GetRequests, 431 SyntacticMatches, 6 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=108occurred in iteration=10, InterpolantAutomatonStates: 59, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 10 MinimizatonAttempts, 30 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 404 NumberOfCodeBlocks, 404 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 495 ConstructedInterpolants, 0 QuantifiedInterpolants, 1409 SizeOfPredicates, 17 NumberOfNonLiveVariables, 1015 ConjunctsInSsa, 95 ConjunctsInUnsatCore, 14 InterpolantComputations, 6 PerfectInterpolantSequences, 257/289 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-03-20 10:07:27,621 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...