/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_unwindbound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 10:01:54,824 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 10:01:54,826 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 10:01:54,856 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 10:01:54,856 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 10:01:54,859 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 10:01:54,860 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 10:01:54,864 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 10:01:54,866 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 10:01:54,869 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 10:01:54,869 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 10:01:54,870 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 10:01:54,870 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 10:01:54,872 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 10:01:54,873 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 10:01:54,874 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 10:01:54,876 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 10:01:54,876 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 10:01:54,878 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 10:01:54,882 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 10:01:54,883 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 10:01:54,885 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 10:01:54,886 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 10:01:54,888 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 10:01:54,892 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 10:01:54,898 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 10:01:54,899 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 10:01:54,899 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 10:01:54,903 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 10:01:54,916 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 10:01:54,916 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 10:01:54,918 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 10:01:54,918 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 10:01:54,919 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 10:01:54,919 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 10:01:54,919 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 10:01:54,919 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 10:01:54,919 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 10:01:54,919 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 10:01:54,920 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 10:01:54,920 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 10:01:54,920 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 10:01:54,920 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 10:01:54,921 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 10:01:54,921 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 10:01:54,921 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 10:01:54,921 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 10:01:54,921 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 10:01:54,921 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 10:01:54,921 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 10:01:54,922 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 10:01:54,922 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 10:01:55,197 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 10:01:55,217 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 10:01:55,219 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 10:01:55,219 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 10:01:55,220 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 10:01:55,221 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_unwindbound100.c [2021-05-06 10:01:55,272 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/69649cb33/822cbc125bcf4e168a3f8262a01502b6/FLAGb37b0f709 [2021-05-06 10:01:55,565 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 10:01:55,565 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_unwindbound100.c [2021-05-06 10:01:55,569 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/69649cb33/822cbc125bcf4e168a3f8262a01502b6/FLAGb37b0f709 [2021-05-06 10:01:56,011 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/69649cb33/822cbc125bcf4e168a3f8262a01502b6 [2021-05-06 10:01:56,013 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 10:01:56,014 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 10:01:56,017 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 10:01:56,017 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 10:01:56,019 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 10:01:56,019 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 10:01:56" (1/1) ... [2021-05-06 10:01:56,020 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a6c902 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:01:56, skipping insertion in model container [2021-05-06 10:01:56,020 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 10:01:56" (1/1) ... [2021-05-06 10:01:56,025 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 10:01:56,035 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 10:01:56,117 WARN L224 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/prodbin-ll_unwindbound100.c[537,550] [2021-05-06 10:01:56,125 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 10:01:56,130 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 10:01:56,137 WARN L224 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/prodbin-ll_unwindbound100.c[537,550] [2021-05-06 10:01:56,141 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 10:01:56,149 INFO L208 MainTranslator]: Completed translation [2021-05-06 10:01:56,150 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:01:56 WrapperNode [2021-05-06 10:01:56,150 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 10:01:56,151 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 10:01:56,151 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 10:01:56,151 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 10:01:56,157 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:01:56" (1/1) ... [2021-05-06 10:01:56,157 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:01:56" (1/1) ... [2021-05-06 10:01:56,170 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:01:56" (1/1) ... [2021-05-06 10:01:56,170 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:01:56" (1/1) ... [2021-05-06 10:01:56,173 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:01:56" (1/1) ... [2021-05-06 10:01:56,175 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:01:56" (1/1) ... [2021-05-06 10:01:56,176 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:01:56" (1/1) ... [2021-05-06 10:01:56,183 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 10:01:56,186 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 10:01:56,186 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 10:01:56,186 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 10:01:56,187 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:01:56" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 10:01:56,247 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 10:01:56,247 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 10:01:56,247 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 10:01:56,247 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 10:01:56,247 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 10:01:56,248 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 10:01:56,248 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 10:01:56,248 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 10:01:56,248 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 10:01:56,248 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 10:01:56,248 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 10:01:56,248 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 10:01:56,249 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 10:01:56,249 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 10:01:56,249 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 10:01:56,249 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 10:01:56,249 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 10:01:56,249 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 10:01:56,250 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 10:01:56,250 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 10:01:56,506 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 10:01:56,506 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 10:01:56,507 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 10:01:56 BoogieIcfgContainer [2021-05-06 10:01:56,507 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 10:01:56,508 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 10:01:56,508 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 10:01:56,508 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 10:01:56,517 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 10:01:56" (1/1) ... [2021-05-06 10:01:56,533 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 10:01:56 BasicIcfg [2021-05-06 10:01:56,534 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 10:01:56,535 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 10:01:56,535 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 10:01:56,542 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 10:01:56,542 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 10:01:56" (1/4) ... [2021-05-06 10:01:56,543 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cfbc39c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 10:01:56, skipping insertion in model container [2021-05-06 10:01:56,544 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:01:56" (2/4) ... [2021-05-06 10:01:56,544 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cfbc39c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 10:01:56, skipping insertion in model container [2021-05-06 10:01:56,544 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 10:01:56" (3/4) ... [2021-05-06 10:01:56,545 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cfbc39c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 10:01:56, skipping insertion in model container [2021-05-06 10:01:56,545 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 10:01:56" (4/4) ... [2021-05-06 10:01:56,546 INFO L111 eAbstractionObserver]: Analyzing ICFG prodbin-ll_unwindbound100.cJordan [2021-05-06 10:01:56,550 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 10:01:56,554 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 10:01:56,565 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 10:01:56,584 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 10:01:56,585 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 10:01:56,585 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 10:01:56,585 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 10:01:56,585 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 10:01:56,585 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 10:01:56,585 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 10:01:56,585 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 10:01:56,597 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 10:01:56,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 10:01:56,603 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:01:56,603 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:01:56,604 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:01:56,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:01:56,608 INFO L82 PathProgramCache]: Analyzing trace with hash 1957529129, now seen corresponding path program 1 times [2021-05-06 10:01:56,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:01:56,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116361433] [2021-05-06 10:01:56,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:01:56,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:01:56,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 10:01:56,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:01:56,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 10:01:56,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:01:56,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:01:56,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:01:56,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116361433] [2021-05-06 10:01:56,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116361433] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:01:56,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:01:56,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 10:01:56,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492975935] [2021-05-06 10:01:56,863 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 10:01:56,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:01:56,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 10:01:56,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 10:01:56,876 INFO L87 Difference]: Start difference. First operand has 30 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) 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, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 10:01:56,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:01:56,975 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2021-05-06 10:01:56,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 10:01:56,976 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, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-06 10:01:56,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:01:56,981 INFO L225 Difference]: With dead ends: 31 [2021-05-06 10:01:56,982 INFO L226 Difference]: Without dead ends: 26 [2021-05-06 10:01:56,983 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 58.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 10:01:56,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-06 10:01:57,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2021-05-06 10:01:57,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 10:01:57,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-05-06 10:01:57,012 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 17 [2021-05-06 10:01:57,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:01:57,013 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-05-06 10:01:57,013 INFO L481 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, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 10:01:57,013 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-05-06 10:01:57,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-06 10:01:57,014 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:01:57,014 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:01:57,014 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 10:01:57,014 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:01:57,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:01:57,015 INFO L82 PathProgramCache]: Analyzing trace with hash 583261658, now seen corresponding path program 1 times [2021-05-06 10:01:57,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:01:57,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029380851] [2021-05-06 10:01:57,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:01:57,041 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:01:57,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1342552275] [2021-05-06 10:01:57,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:01:57,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:01:57,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 10:01:57,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:01:57,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:01:57,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:01:57,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:01:57,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:01:57,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:01:57,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:01:57,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:01:57,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029380851] [2021-05-06 10:01:57,236 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:01:57,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342552275] [2021-05-06 10:01:57,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342552275] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:01:57,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:01:57,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 10:01:57,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964722252] [2021-05-06 10:01:57,237 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 10:01:57,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:01:57,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 10:01:57,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 10:01:57,238 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 10:01:57,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:01:57,259 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2021-05-06 10:01:57,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 10:01:57,260 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2021-05-06 10:01:57,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:01:57,260 INFO L225 Difference]: With dead ends: 27 [2021-05-06 10:01:57,260 INFO L226 Difference]: Without dead ends: 27 [2021-05-06 10:01:57,261 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.2ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 10:01:57,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-06 10:01:57,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-06 10:01:57,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 10:01:57,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2021-05-06 10:01:57,274 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 18 [2021-05-06 10:01:57,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:01:57,274 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2021-05-06 10:01:57,275 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 10:01:57,275 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2021-05-06 10:01:57,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-06 10:01:57,275 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:01:57,275 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:01:57,476 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 10:01:57,476 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:01:57,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:01:57,477 INFO L82 PathProgramCache]: Analyzing trace with hash 584363925, now seen corresponding path program 1 times [2021-05-06 10:01:57,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:01:57,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025517309] [2021-05-06 10:01:57,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:01:57,490 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:01:57,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [459921913] [2021-05-06 10:01:57,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:01:57,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:01:57,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 10:01:57,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:01:57,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:01:57,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:01:57,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:01:57,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025517309] [2021-05-06 10:01:57,666 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:01:57,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459921913] [2021-05-06 10:01:57,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459921913] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:01:57,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:01:57,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 10:01:57,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677002430] [2021-05-06 10:01:57,667 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 10:01:57,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:01:57,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 10:01:57,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 10:01:57,668 INFO L87 Difference]: Start difference. First operand 27 states and 30 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 10:01:57,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:01:57,712 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2021-05-06 10:01:57,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 10:01:57,712 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-05-06 10:01:57,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:01:57,713 INFO L225 Difference]: With dead ends: 36 [2021-05-06 10:01:57,713 INFO L226 Difference]: Without dead ends: 36 [2021-05-06 10:01:57,713 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.7ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:01:57,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-06 10:01:57,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32. [2021-05-06 10:01:57,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 23 states have internal predecessors, (25), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 10:01:57,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2021-05-06 10:01:57,717 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 18 [2021-05-06 10:01:57,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:01:57,717 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2021-05-06 10:01:57,717 INFO L481 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 10:01:57,717 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2021-05-06 10:01:57,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-06 10:01:57,718 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:01:57,718 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:01:57,928 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:01:57,929 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:01:57,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:01:57,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1698322804, now seen corresponding path program 1 times [2021-05-06 10:01:57,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:01:57,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305931131] [2021-05-06 10:01:57,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:01:57,937 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:01:57,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1108656857] [2021-05-06 10:01:57,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:01:57,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:01:57,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 10:01:57,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:01:58,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:01:58,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:01:58,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:01:58,070 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:01:58,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:01:58,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305931131] [2021-05-06 10:01:58,071 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:01:58,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108656857] [2021-05-06 10:01:58,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108656857] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:01:58,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:01:58,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 10:01:58,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276635078] [2021-05-06 10:01:58,071 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 10:01:58,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:01:58,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 10:01:58,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:01:58,072 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 10:01:58,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:01:58,122 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2021-05-06 10:01:58,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 10:01:58,122 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2021-05-06 10:01:58,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:01:58,123 INFO L225 Difference]: With dead ends: 35 [2021-05-06 10:01:58,123 INFO L226 Difference]: Without dead ends: 35 [2021-05-06 10:01:58,123 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 26.1ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-06 10:01:58,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-06 10:01:58,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2021-05-06 10:01:58,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 10:01:58,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2021-05-06 10:01:58,126 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 24 [2021-05-06 10:01:58,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:01:58,126 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2021-05-06 10:01:58,126 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 10:01:58,126 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2021-05-06 10:01:58,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 10:01:58,127 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:01:58,127 INFO L523 BasicCegarLoop]: trace histogram [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] [2021-05-06 10:01:58,340 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:01:58,341 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:01:58,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:01:58,341 INFO L82 PathProgramCache]: Analyzing trace with hash 919545147, now seen corresponding path program 1 times [2021-05-06 10:01:58,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:01:58,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775229719] [2021-05-06 10:01:58,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:01:58,351 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:01:58,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1993571189] [2021-05-06 10:01:58,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:01:58,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:01:58,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 10:01:58,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:01:58,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:01:58,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:01:58,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:01:58,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:01:58,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:01:58,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:01:58,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:01:58,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:01:58,502 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:01:58,503 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:01:58,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775229719] [2021-05-06 10:01:58,503 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:01:58,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993571189] [2021-05-06 10:01:58,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993571189] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:01:58,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:01:58,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-06 10:01:58,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385633787] [2021-05-06 10:01:58,506 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 10:01:58,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:01:58,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 10:01:58,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 10:01:58,507 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 10:01:58,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:01:58,539 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2021-05-06 10:01:58,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 10:01:58,539 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2021-05-06 10:01:58,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:01:58,540 INFO L225 Difference]: With dead ends: 37 [2021-05-06 10:01:58,541 INFO L226 Difference]: Without dead ends: 37 [2021-05-06 10:01:58,543 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 12.3ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:01:58,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-05-06 10:01:58,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-05-06 10:01:58,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 27 states have internal predecessors, (31), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 10:01:58,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2021-05-06 10:01:58,556 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 28 [2021-05-06 10:01:58,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:01:58,556 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2021-05-06 10:01:58,557 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 10:01:58,557 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2021-05-06 10:01:58,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 10:01:58,558 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:01:58,558 INFO L523 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] [2021-05-06 10:01:58,764 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:01:58,765 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:01:58,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:01:58,765 INFO L82 PathProgramCache]: Analyzing trace with hash 920647414, now seen corresponding path program 1 times [2021-05-06 10:01:58,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:01:58,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626721105] [2021-05-06 10:01:58,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:01:58,773 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:01:58,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1041465107] [2021-05-06 10:01:58,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:01:58,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:01:58,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-06 10:01:58,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:01:59,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:01:59,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:01:59,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:01:59,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:01:59,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:01:59,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:01:59,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:01:59,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:01:59,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:01:59,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:01:59,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:01:59,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:01:59,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:01:59,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:01:59,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:01:59,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:01:59,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:01:59,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:01:59,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:01:59,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:01:59,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:01:59,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:01:59,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:01:59,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:01:59,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:01:59,174 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:01:59,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:01:59,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626721105] [2021-05-06 10:01:59,175 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:01:59,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041465107] [2021-05-06 10:01:59,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041465107] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:01:59,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:01:59,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 10:01:59,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230001392] [2021-05-06 10:01:59,175 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 10:01:59,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:01:59,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 10:01:59,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 10:01:59,176 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 10:01:59,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:01:59,601 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2021-05-06 10:01:59,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 10:01:59,602 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2021-05-06 10:01:59,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:01:59,602 INFO L225 Difference]: With dead ends: 49 [2021-05-06 10:01:59,602 INFO L226 Difference]: Without dead ends: 49 [2021-05-06 10:01:59,603 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 140.7ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-06 10:01:59,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-05-06 10:01:59,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2021-05-06 10:01:59,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 32 states have (on average 1.15625) internal successors, (37), 34 states have internal predecessors, (37), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 10:01:59,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2021-05-06 10:01:59,606 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 28 [2021-05-06 10:01:59,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:01:59,606 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2021-05-06 10:01:59,606 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 10:01:59,606 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2021-05-06 10:01:59,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 10:01:59,606 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:01:59,606 INFO L523 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] [2021-05-06 10:01:59,813 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-06 10:01:59,813 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:01:59,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:01:59,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1631509547, now seen corresponding path program 1 times [2021-05-06 10:01:59,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:01:59,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900056323] [2021-05-06 10:01:59,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:01:59,821 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:01:59,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [618196571] [2021-05-06 10:01:59,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:01:59,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:01:59,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-06 10:01:59,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:01:59,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:01:59,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:01:59,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:01:59,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:01:59,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:01:59,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:01:59,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:01:59,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:01:59,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:01:59,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:01:59,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:01:59,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:01:59,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:01:59,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:01:59,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:01:59,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:02:00,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:02:00,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:02:00,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:02:00,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:02:00,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:02:00,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:02:00,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:02:00,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:02:00,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:02:00,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:02:00,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:02:00,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:02:00,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:02:00,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:02:00,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:02:00,041 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:02:00,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:02:00,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900056323] [2021-05-06 10:02:00,041 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:02:00,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618196571] [2021-05-06 10:02:00,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618196571] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:02:00,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:02:00,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 10:02:00,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965970402] [2021-05-06 10:02:00,042 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 10:02:00,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:02:00,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 10:02:00,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-06 10:02:00,043 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 10:02:00,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:02:00,175 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2021-05-06 10:02:00,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 10:02:00,180 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2021-05-06 10:02:00,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:02:00,182 INFO L225 Difference]: With dead ends: 53 [2021-05-06 10:02:00,182 INFO L226 Difference]: Without dead ends: 53 [2021-05-06 10:02:00,182 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 66.8ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-06 10:02:00,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-05-06 10:02:00,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2021-05-06 10:02:00,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 38 states have internal predecessors, (41), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 10:02:00,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2021-05-06 10:02:00,186 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 28 [2021-05-06 10:02:00,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:02:00,186 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2021-05-06 10:02:00,186 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 10:02:00,187 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2021-05-06 10:02:00,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-06 10:02:00,187 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:02:00,187 INFO L523 BasicCegarLoop]: trace histogram [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] [2021-05-06 10:02:00,396 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:02:00,397 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:02:00,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:02:00,397 INFO L82 PathProgramCache]: Analyzing trace with hash -357510123, now seen corresponding path program 1 times [2021-05-06 10:02:00,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:02:00,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939892283] [2021-05-06 10:02:00,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:02:00,403 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:02:00,404 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1511861324] [2021-05-06 10:02:00,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:02:00,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:02:00,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-06 10:02:00,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:02:00,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:02:00,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:02:00,552 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 10:02:00,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:02:00,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939892283] [2021-05-06 10:02:00,552 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:02:00,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511861324] [2021-05-06 10:02:00,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511861324] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:02:00,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:02:00,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 10:02:00,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15414558] [2021-05-06 10:02:00,553 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 10:02:00,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:02:00,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 10:02:00,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 10:02:00,553 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4)