/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/ps6-ll_unwindbound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 22:37:24,793 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 22:37:24,795 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 22:37:24,828 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 22:37:24,843 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 22:37:24,844 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 22:37:24,846 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 22:37:24,847 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 22:37:24,848 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 22:37:24,849 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 22:37:24,851 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 22:37:24,855 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 22:37:24,856 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 22:37:24,857 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 22:37:24,857 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 22:37:24,859 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 22:37:24,864 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 22:37:24,871 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 22:37:24,872 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 22:37:24,872 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 22:37:24,876 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 22:37:24,905 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 22:37:24,906 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 22:37:24,908 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 22:37:24,908 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 22:37:24,908 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 22:37:24,908 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 22:37:24,908 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 22:37:24,908 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 22:37:24,909 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 22:37:24,909 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 22:37:24,909 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 22:37:24,910 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 22:37:24,910 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 22:37:24,910 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 22:37:24,910 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 22:37:24,910 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 22:37:24,910 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 22:37:24,910 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 22:37:24,910 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 22:37:24,911 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 22:37:24,911 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 22:37:24,911 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 22:37:24,912 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 22:37:25,167 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 22:37:25,191 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 22:37:25,192 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 22:37:25,193 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 22:37:25,194 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 22:37:25,194 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps6-ll_unwindbound10.c [2021-05-02 22:37:25,262 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/15c29e328/4d039ad1621447ff9c2bf30f864e45d1/FLAG24a11e0b9 [2021-05-02 22:37:25,636 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 22:37:25,636 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps6-ll_unwindbound10.c [2021-05-02 22:37:25,642 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/15c29e328/4d039ad1621447ff9c2bf30f864e45d1/FLAG24a11e0b9 [2021-05-02 22:37:25,660 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/15c29e328/4d039ad1621447ff9c2bf30f864e45d1 [2021-05-02 22:37:25,662 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 22:37:25,663 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 22:37:25,667 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 22:37:25,667 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 22:37:25,670 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 22:37:25,671 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 10:37:25" (1/1) ... [2021-05-02 22:37:25,672 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f2a68b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:37:25, skipping insertion in model container [2021-05-02 22:37:25,672 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 10:37:25" (1/1) ... [2021-05-02 22:37:25,677 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 22:37:25,689 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 22:37:25,806 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/ps6-ll_unwindbound10.c[458,471] [2021-05-02 22:37:25,827 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 22:37:25,868 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 22:37:25,880 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/ps6-ll_unwindbound10.c[458,471] [2021-05-02 22:37:25,898 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 22:37:25,906 INFO L208 MainTranslator]: Completed translation [2021-05-02 22:37:25,907 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:37:25 WrapperNode [2021-05-02 22:37:25,907 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 22:37:25,907 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 22:37:25,907 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 22:37:25,908 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 22:37:25,917 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:37:25" (1/1) ... [2021-05-02 22:37:25,918 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:37:25" (1/1) ... [2021-05-02 22:37:25,922 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:37:25" (1/1) ... [2021-05-02 22:37:25,923 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:37:25" (1/1) ... [2021-05-02 22:37:25,931 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:37:25" (1/1) ... [2021-05-02 22:37:25,935 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:37:25" (1/1) ... [2021-05-02 22:37:25,939 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:37:25" (1/1) ... [2021-05-02 22:37:25,943 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 22:37:25,944 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 22:37:25,945 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 22:37:25,945 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 22:37:25,945 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:37:25" (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 [2021-05-02 22:37:26,020 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 22:37:26,020 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 22:37:26,021 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 22:37:26,021 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 22:37:26,021 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 22:37:26,021 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 22:37:26,021 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 22:37:26,021 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 22:37:26,021 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 22:37:26,022 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 22:37:26,022 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2021-05-02 22:37:26,022 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 22:37:26,022 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 22:37:26,022 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 22:37:26,023 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 22:37:26,023 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 22:37:26,023 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 22:37:26,023 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 22:37:26,023 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 22:37:26,023 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 22:37:26,195 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 22:37:26,195 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 22:37:26,196 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 10:37:26 BoogieIcfgContainer [2021-05-02 22:37:26,196 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 22:37:26,197 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 22:37:26,197 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 22:37:26,197 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 22:37:26,199 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 10:37:26" (1/1) ... [2021-05-02 22:37:26,211 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 10:37:26 BasicIcfg [2021-05-02 22:37:26,211 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 22:37:26,212 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 22:37:26,212 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 22:37:26,214 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 22:37:26,214 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 10:37:25" (1/4) ... [2021-05-02 22:37:26,214 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c2dd108 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 10:37:26, skipping insertion in model container [2021-05-02 22:37:26,214 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:37:25" (2/4) ... [2021-05-02 22:37:26,215 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c2dd108 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 10:37:26, skipping insertion in model container [2021-05-02 22:37:26,215 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 10:37:26" (3/4) ... [2021-05-02 22:37:26,215 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c2dd108 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 10:37:26, skipping insertion in model container [2021-05-02 22:37:26,215 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 10:37:26" (4/4) ... [2021-05-02 22:37:26,216 INFO L111 eAbstractionObserver]: Analyzing ICFG ps6-ll_unwindbound10.cJordan [2021-05-02 22:37:26,219 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 22:37:26,222 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 22:37:26,232 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 22:37:26,245 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 22:37:26,245 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 22:37:26,245 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 22:37:26,245 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 22:37:26,245 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 22:37:26,245 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 22:37:26,245 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 22:37:26,245 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 22:37:26,253 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 22:37:26,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 22:37:26,258 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:37:26,258 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:37:26,259 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:37:26,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:37:26,262 INFO L82 PathProgramCache]: Analyzing trace with hash 843387237, now seen corresponding path program 1 times [2021-05-02 22:37:26,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:37:26,268 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454280279] [2021-05-02 22:37:26,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:37:26,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:37:26,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 22:37:26,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:37:26,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 22:37:26,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:37:26,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:37:26,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:37:26,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454280279] [2021-05-02 22:37:26,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454280279] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 22:37:26,420 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 22:37:26,420 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 22:37:26,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807529997] [2021-05-02 22:37:26,423 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 22:37:26,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:37:26,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 22:37:26,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 22:37:26,433 INFO L87 Difference]: Start difference. First operand has 29 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) 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), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 22:37:26,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:37:26,486 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2021-05-02 22:37:26,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 22:37:26,488 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), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-02 22:37:26,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:37:26,492 INFO L225 Difference]: With dead ends: 30 [2021-05-02 22:37:26,492 INFO L226 Difference]: Without dead ends: 25 [2021-05-02 22:37:26,493 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 22:37:26,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-02 22:37:26,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2021-05-02 22:37:26,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 22:37:26,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-05-02 22:37:26,513 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 17 [2021-05-02 22:37:26,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:37:26,513 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-05-02 22:37:26,513 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), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 22:37:26,514 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-05-02 22:37:26,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 22:37:26,514 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:37:26,514 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:37:26,514 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 22:37:26,514 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:37:26,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:37:26,515 INFO L82 PathProgramCache]: Analyzing trace with hash 208087835, now seen corresponding path program 1 times [2021-05-02 22:37:26,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:37:26,515 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143054631] [2021-05-02 22:37:26,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:37:26,528 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:37:26,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1399461491] [2021-05-02 22:37:26,529 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 [2021-05-02 22:37:26,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:37:26,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 22:37:26,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:37:26,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:37:26,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:37:26,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:37:26,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:37:26,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:37:26,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:37:26,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:37:26,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143054631] [2021-05-02 22:37:26,657 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:37:26,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399461491] [2021-05-02 22:37:26,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399461491] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 22:37:26,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 22:37:26,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 22:37:26,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225716454] [2021-05-02 22:37:26,658 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 22:37:26,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:37:26,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 22:37:26,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 22:37:26,659 INFO L87 Difference]: Start difference. First operand 24 states and 27 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) [2021-05-02 22:37:26,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:37:26,667 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2021-05-02 22:37:26,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 22:37:26,668 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 [2021-05-02 22:37:26,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:37:26,668 INFO L225 Difference]: With dead ends: 26 [2021-05-02 22:37:26,668 INFO L226 Difference]: Without dead ends: 26 [2021-05-02 22:37:26,669 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.2ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 22:37:26,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-02 22:37:26,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-05-02 22:37:26,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 22:37:26,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2021-05-02 22:37:26,672 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 18 [2021-05-02 22:37:26,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:37:26,672 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2021-05-02 22:37:26,672 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) [2021-05-02 22:37:26,672 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2021-05-02 22:37:26,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 22:37:26,673 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:37:26,673 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:37:26,888 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 22:37:26,889 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:37:26,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:37:26,889 INFO L82 PathProgramCache]: Analyzing trace with hash 209190102, now seen corresponding path program 1 times [2021-05-02 22:37:26,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:37:26,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922726253] [2021-05-02 22:37:26,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:37:26,899 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:37:26,900 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [621606247] [2021-05-02 22:37:26,900 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 [2021-05-02 22:37:26,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:37:26,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 22:37:26,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:37:26,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:37:26,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:37:26,999 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:37:26,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922726253] [2021-05-02 22:37:26,999 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:37:26,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621606247] [2021-05-02 22:37:26,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621606247] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 22:37:26,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 22:37:26,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-02 22:37:26,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898431838] [2021-05-02 22:37:27,000 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 22:37:27,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:37:27,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 22:37:27,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 22:37:27,001 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 22:37:27,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:37:27,336 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2021-05-02 22:37:27,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 22:37:27,336 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-05-02 22:37:27,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:37:27,337 INFO L225 Difference]: With dead ends: 34 [2021-05-02 22:37:27,337 INFO L226 Difference]: Without dead ends: 32 [2021-05-02 22:37:27,337 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 31.0ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-02 22:37:27,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-02 22:37:27,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-02 22:37:27,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 22:37:27,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2021-05-02 22:37:27,342 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 18 [2021-05-02 22:37:27,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:37:27,342 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2021-05-02 22:37:27,342 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 22:37:27,342 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2021-05-02 22:37:27,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-02 22:37:27,343 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:37:27,343 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] [2021-05-02 22:37:27,558 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:37:27,559 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:37:27,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:37:27,559 INFO L82 PathProgramCache]: Analyzing trace with hash -1223799235, now seen corresponding path program 1 times [2021-05-02 22:37:27,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:37:27,559 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013567470] [2021-05-02 22:37:27,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:37:27,568 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:37:27,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1098499647] [2021-05-02 22:37:27,568 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 [2021-05-02 22:37:27,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:37:27,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 22:37:27,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:37:27,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:37:27,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:37:27,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:37:27,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:37:27,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:37:27,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:37:27,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:37:27,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:37:27,670 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:37:27,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:37:27,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013567470] [2021-05-02 22:37:27,671 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:37:27,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098499647] [2021-05-02 22:37:27,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098499647] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:37:27,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:37:27,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 22:37:27,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981148378] [2021-05-02 22:37:27,672 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 22:37:27,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:37:27,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 22:37:27,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 22:37:27,674 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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) [2021-05-02 22:37:27,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:37:27,716 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2021-05-02 22:37:27,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 22:37:27,716 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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 26 [2021-05-02 22:37:27,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:37:27,717 INFO L225 Difference]: With dead ends: 34 [2021-05-02 22:37:27,717 INFO L226 Difference]: Without dead ends: 34 [2021-05-02 22:37:27,717 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 22.7ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 22:37:27,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-02 22:37:27,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-05-02 22:37:27,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 22:37:27,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2021-05-02 22:37:27,720 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 26 [2021-05-02 22:37:27,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:37:27,721 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2021-05-02 22:37:27,721 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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) [2021-05-02 22:37:27,721 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2021-05-02 22:37:27,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-02 22:37:27,721 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:37:27,721 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] [2021-05-02 22:37:27,937 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:37:27,937 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:37:27,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:37:27,938 INFO L82 PathProgramCache]: Analyzing trace with hash -1222696968, now seen corresponding path program 1 times [2021-05-02 22:37:27,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:37:27,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508035399] [2021-05-02 22:37:27,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:37:27,947 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:37:27,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1094623080] [2021-05-02 22:37:27,948 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 [2021-05-02 22:37:28,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:37:28,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 22:37:28,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:37:28,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:37:28,102 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:37:28,102 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:37:28,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508035399] [2021-05-02 22:37:28,102 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:37:28,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094623080] [2021-05-02 22:37:28,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094623080] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:37:28,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:37:28,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 22:37:28,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710403932] [2021-05-02 22:37:28,103 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 22:37:28,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:37:28,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 22:37:28,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 22:37:28,104 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 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) [2021-05-02 22:37:28,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:37:28,467 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2021-05-02 22:37:28,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 22:37:28,467 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 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 26 [2021-05-02 22:37:28,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:37:28,468 INFO L225 Difference]: With dead ends: 42 [2021-05-02 22:37:28,468 INFO L226 Difference]: Without dead ends: 42 [2021-05-02 22:37:28,468 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 40.9ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-02 22:37:28,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-02 22:37:28,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2021-05-02 22:37:28,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 28 states have internal predecessors, (30), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 22:37:28,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2021-05-02 22:37:28,472 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 26 [2021-05-02 22:37:28,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:37:28,472 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2021-05-02 22:37:28,473 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 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) [2021-05-02 22:37:28,473 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2021-05-02 22:37:28,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-02 22:37:28,473 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:37:28,473 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:37:28,677 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:37:28,677 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:37:28,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:37:28,678 INFO L82 PathProgramCache]: Analyzing trace with hash -688312481, now seen corresponding path program 2 times [2021-05-02 22:37:28,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:37:28,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047518825] [2021-05-02 22:37:28,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:37:28,686 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:37:28,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1182754123] [2021-05-02 22:37:28,686 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2021-05-02 22:37:28,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 22:37:28,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:37:28,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 22:37:28,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:37:28,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:37:28,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:37:28,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:37:28,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:37:28,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:37:28,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:37:28,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:37:28,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:37:28,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:37:28,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:37:28,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:37:28,810 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:37:28,810 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:37:28,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047518825] [2021-05-02 22:37:28,810 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:37:28,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182754123] [2021-05-02 22:37:28,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182754123] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:37:28,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:37:28,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 22:37:28,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339334626] [2021-05-02 22:37:28,811 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 22:37:28,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:37:28,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 22:37:28,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 22:37:28,811 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 5 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 22:37:28,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:37:28,895 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2021-05-02 22:37:28,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 22:37:28,895 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 5 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Word has length 34 [2021-05-02 22:37:28,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:37:28,896 INFO L225 Difference]: With dead ends: 50 [2021-05-02 22:37:28,896 INFO L226 Difference]: Without dead ends: 48 [2021-05-02 22:37:28,896 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 27.4ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-02 22:37:28,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-02 22:37:28,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2021-05-02 22:37:28,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 31 states have internal predecessors, (34), 10 states have call successors, (10), 7 states have call predecessors, (10), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 22:37:28,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2021-05-02 22:37:28,900 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 34 [2021-05-02 22:37:28,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:37:28,900 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2021-05-02 22:37:28,900 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 5 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 22:37:28,900 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2021-05-02 22:37:28,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-02 22:37:28,901 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:37:28,901 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:37:29,109 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 22:37:29,109 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:37:29,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:37:29,110 INFO L82 PathProgramCache]: Analyzing trace with hash -687210214, now seen corresponding path program 2 times [2021-05-02 22:37:29,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:37:29,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835384280] [2021-05-02 22:37:29,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:37:29,117 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:37:29,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2130247693] [2021-05-02 22:37:29,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2021-05-02 22:37:29,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 22:37:29,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:37:29,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 22:37:29,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:37:29,338 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 22:37:29,338 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:37:29,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835384280] [2021-05-02 22:37:29,338 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:37:29,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130247693] [2021-05-02 22:37:29,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130247693] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:37:29,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:37:29,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 22:37:29,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453999611] [2021-05-02 22:37:29,339 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 22:37:29,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:37:29,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 22:37:29,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-02 22:37:29,339 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 4 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) [2021-05-02 22:37:34,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:37:34,304 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2021-05-02 22:37:34,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 22:37:34,305 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 4 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 34 [2021-05-02 22:37:34,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:37:34,305 INFO L225 Difference]: With dead ends: 54 [2021-05-02 22:37:34,305 INFO L226 Difference]: Without dead ends: 54 [2021-05-02 22:37:34,306 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 73.6ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-02 22:37:34,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-02 22:37:34,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2021-05-02 22:37:34,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 36 states have internal predecessors, (39), 12 states have call successors, (12), 8 states have call predecessors, (12), 6 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 22:37:34,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2021-05-02 22:37:34,309 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 34 [2021-05-02 22:37:34,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:37:34,310 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2021-05-02 22:37:34,310 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 4 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) [2021-05-02 22:37:34,310 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2021-05-02 22:37:34,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-02 22:37:34,311 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:37:34,311 INFO L523 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] [2021-05-02 22:37:34,521 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:37:34,521 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:37:34,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:37:34,521 INFO L82 PathProgramCache]: Analyzing trace with hash 96926796, now seen corresponding path program 1 times [2021-05-02 22:37:34,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:37:34,522 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004898033] [2021-05-02 22:37:34,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:37:34,528 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:37:34,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [89250242] [2021-05-02 22:37:34,529 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 [2021-05-02 22:37:34,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:37:34,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-02 22:37:34,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:37:34,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:37:34,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:37:34,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:37:34,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:37:34,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:37:34,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:37:34,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:37:34,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:37:34,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:37:36,756 WARN L860 $PredicateComparison]: unable to prove that (and (<= c_main_~k~0 1) (= c_main_~y~0 1) (= (+ (* c_main_~y~0 c_main_~y~0) (* 6 (* c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0))) (+ (* 5 (* c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0)) (* 2 (* c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0)))) (< 0 c_main_~k~0)) is different from true [2021-05-02 22:37:36,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:37:36,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:37:36,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:37:36,795 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-02 22:37:36,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:37:36,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004898033] [2021-05-02 22:37:36,795 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:37:36,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89250242] [2021-05-02 22:37:36,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89250242] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:37:36,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:37:36,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 22:37:36,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949993111] [2021-05-02 22:37:36,796 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 22:37:36,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:37:36,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 22:37:36,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=108, Unknown=1, NotChecked=20, Total=156 [2021-05-02 22:37:36,797 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand has 13 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 22:37:45,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:37:45,557 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2021-05-02 22:37:45,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 22:37:45,557 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 37 [2021-05-02 22:37:45,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:37:45,559 INFO L225 Difference]: With dead ends: 53 [2021-05-02 22:37:45,559 INFO L226 Difference]: Without dead ends: 49 [2021-05-02 22:37:45,559 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 2148.2ms TimeCoverageRelationStatistics Valid=47, Invalid=196, Unknown=1, NotChecked=28, Total=272 [2021-05-02 22:37:45,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-05-02 22:37:45,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-05-02 22:37:45,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 32 states have (on average 1.125) internal successors, (36), 34 states have internal predecessors, (36), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 22:37:45,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2021-05-02 22:37:45,562 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 37 [2021-05-02 22:37:45,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:37:45,562 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2021-05-02 22:37:45,563 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 22:37:45,563 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2021-05-02 22:37:45,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-02 22:37:45,563 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:37:45,563 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:37:45,766 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:37:45,766 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:37:45,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:37:45,767 INFO L82 PathProgramCache]: Analyzing trace with hash 1133104769, now seen corresponding path program 3 times [2021-05-02 22:37:45,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:37:45,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472461931] [2021-05-02 22:37:45,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:37:45,774 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:37:45,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [991975090] [2021-05-02 22:37:45,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true