/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_valuebound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 10:52:52,699 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 10:52:52,701 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 10:52:52,739 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 10:52:52,758 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 10:52:52,760 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 10:52:52,761 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 10:52:52,762 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 10:52:52,764 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 10:52:52,765 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 10:52:52,767 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 10:52:52,772 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 10:52:52,773 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 10:52:52,775 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 10:52:52,776 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 10:52:52,777 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 10:52:52,783 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 10:52:52,791 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 10:52:52,792 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 10:52:52,794 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 10:52:52,795 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 10:52:52,820 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 10:52:52,820 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 10:52:52,823 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 10:52:52,823 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 10:52:52,823 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 10:52:52,824 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 10:52:52,824 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 10:52:52,824 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 10:52:52,824 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 10:52:52,824 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 10:52:52,825 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 10:52:52,825 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 10:52:52,825 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 10:52:52,826 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 10:52:52,826 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 10:52:52,826 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 10:52:52,826 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 10:52:52,826 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 10:52:52,826 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 10:52:52,827 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 10:52:52,827 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 10:52:52,828 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 10:52:52,828 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 10:52:53,133 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 10:52:53,168 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 10:52:53,169 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 10:52:53,170 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 10:52:53,171 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 10:52:53,171 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps6-ll_valuebound5.c [2021-05-06 10:52:53,228 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba2143eff/3be5014b8cd740b0a78cf10a7987e5dd/FLAG8a27df74d [2021-05-06 10:52:53,538 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 10:52:53,538 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps6-ll_valuebound5.c [2021-05-06 10:52:53,543 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba2143eff/3be5014b8cd740b0a78cf10a7987e5dd/FLAG8a27df74d [2021-05-06 10:52:53,963 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba2143eff/3be5014b8cd740b0a78cf10a7987e5dd [2021-05-06 10:52:53,965 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 10:52:53,966 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 10:52:53,971 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 10:52:53,971 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 10:52:53,974 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 10:52:53,975 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 10:52:53" (1/1) ... [2021-05-06 10:52:53,976 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ecbc950 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:52:53, skipping insertion in model container [2021-05-06 10:52:53,977 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 10:52:53" (1/1) ... [2021-05-06 10:52:53,983 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 10:52:53,999 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 10:52:54,091 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_valuebound5.c[458,471] [2021-05-06 10:52:54,105 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 10:52:54,111 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 10:52:54,120 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_valuebound5.c[458,471] [2021-05-06 10:52:54,126 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 10:52:54,136 INFO L208 MainTranslator]: Completed translation [2021-05-06 10:52:54,137 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:52:54 WrapperNode [2021-05-06 10:52:54,137 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 10:52:54,137 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 10:52:54,138 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 10:52:54,138 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 10:52:54,170 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:52:54" (1/1) ... [2021-05-06 10:52:54,170 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:52:54" (1/1) ... [2021-05-06 10:52:54,177 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:52:54" (1/1) ... [2021-05-06 10:52:54,177 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:52:54" (1/1) ... [2021-05-06 10:52:54,182 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:52:54" (1/1) ... [2021-05-06 10:52:54,186 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:52:54" (1/1) ... [2021-05-06 10:52:54,187 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:52:54" (1/1) ... [2021-05-06 10:52:54,188 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 10:52:54,189 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 10:52:54,189 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 10:52:54,189 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 10:52:54,190 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:52:54" (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 10:52:54,252 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 10:52:54,253 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 10:52:54,253 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 10:52:54,253 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 10:52:54,253 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 10:52:54,253 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 10:52:54,253 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 10:52:54,253 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 10:52:54,253 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 10:52:54,254 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 10:52:54,254 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2021-05-06 10:52:54,254 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 10:52:54,254 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 10:52:54,254 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 10:52:54,254 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 10:52:54,254 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 10:52:54,254 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 10:52:54,254 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 10:52:54,255 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 10:52:54,255 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 10:52:54,484 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 10:52:54,484 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 10:52:54,486 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 10:52:54 BoogieIcfgContainer [2021-05-06 10:52:54,486 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 10:52:54,487 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 10:52:54,487 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 10:52:54,487 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 10:52:54,489 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 10:52:54" (1/1) ... [2021-05-06 10:52:54,522 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 10:52:54 BasicIcfg [2021-05-06 10:52:54,522 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 10:52:54,523 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 10:52:54,524 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 10:52:54,526 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 10:52:54,526 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 10:52:53" (1/4) ... [2021-05-06 10:52:54,527 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f9681ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 10:52:54, skipping insertion in model container [2021-05-06 10:52:54,527 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:52:54" (2/4) ... [2021-05-06 10:52:54,527 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f9681ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 10:52:54, skipping insertion in model container [2021-05-06 10:52:54,527 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 10:52:54" (3/4) ... [2021-05-06 10:52:54,528 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f9681ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 10:52:54, skipping insertion in model container [2021-05-06 10:52:54,528 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 10:52:54" (4/4) ... [2021-05-06 10:52:54,529 INFO L111 eAbstractionObserver]: Analyzing ICFG ps6-ll_valuebound5.cJordan [2021-05-06 10:52:54,533 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 10:52:54,536 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 10:52:54,550 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 10:52:54,565 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 10:52:54,566 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 10:52:54,566 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 10:52:54,566 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 10:52:54,566 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 10:52:54,566 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 10:52:54,566 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 10:52:54,566 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 10:52:54,577 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 10:52:54,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 10:52:54,583 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:52:54,583 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:52:54,584 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:52:54,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:52:54,588 INFO L82 PathProgramCache]: Analyzing trace with hash -1187991702, now seen corresponding path program 1 times [2021-05-06 10:52:54,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:52:54,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910140981] [2021-05-06 10:52:54,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:52:54,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:52:54,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 10:52:54,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:52:54,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 10:52:54,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:52:54,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-06 10:52:54,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:52:54,791 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 10:52:54,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:52:54,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910140981] [2021-05-06 10:52:54,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910140981] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:52:54,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:52:54,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 10:52:54,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560953460] [2021-05-06 10:52:54,798 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 10:52:54,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:52:54,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 10:52:54,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 10:52:54,813 INFO L87 Difference]: Start difference. First operand has 29 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 10:52:54,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:52:54,904 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2021-05-06 10:52:54,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 10:52:54,906 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-06 10:52:54,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:52:54,912 INFO L225 Difference]: With dead ends: 29 [2021-05-06 10:52:54,912 INFO L226 Difference]: Without dead ends: 24 [2021-05-06 10:52:54,913 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 10:52:54,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-05-06 10:52:54,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-05-06 10:52:54,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 10:52:54,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-05-06 10:52:54,944 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 22 [2021-05-06 10:52:54,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:52:54,944 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-05-06 10:52:54,945 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, (5), 3 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 10:52:54,945 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-05-06 10:52:54,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 10:52:54,946 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:52:54,947 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:52:54,947 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 10:52:54,947 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:52:54,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:52:54,956 INFO L82 PathProgramCache]: Analyzing trace with hash 793962506, now seen corresponding path program 1 times [2021-05-06 10:52:54,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:52:54,956 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878403686] [2021-05-06 10:52:54,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:52:54,997 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:52:54,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [144946176] [2021-05-06 10:52:54,997 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 10:52:55,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:52:55,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 10:52:55,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:52:55,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:52:55,208 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 10:52:55,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:52:55,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878403686] [2021-05-06 10:52:55,209 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:52:55,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144946176] [2021-05-06 10:52:55,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144946176] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:52:55,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:52:55,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 10:52:55,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053771015] [2021-05-06 10:52:55,211 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 10:52:55,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:52:55,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 10:52:55,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 10:52:55,213 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 10:52:57,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:52:57,369 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2021-05-06 10:52:57,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 10:52:57,370 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 22 [2021-05-06 10:52:57,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:52:57,371 INFO L225 Difference]: With dead ends: 33 [2021-05-06 10:52:57,371 INFO L226 Difference]: Without dead ends: 31 [2021-05-06 10:52:57,371 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.2ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:52:57,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-05-06 10:52:57,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-05-06 10:52:57,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 states have internal predecessors, (20), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 10:52:57,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2021-05-06 10:52:57,377 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 22 [2021-05-06 10:52:57,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:52:57,378 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2021-05-06 10:52:57,378 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 10:52:57,378 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2021-05-06 10:52:57,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-06 10:52:57,379 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:52:57,379 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:52:57,593 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 10:52:57,593 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:52:57,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:52:57,594 INFO L82 PathProgramCache]: Analyzing trace with hash -503871754, now seen corresponding path program 1 times [2021-05-06 10:52:57,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:52:57,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694926286] [2021-05-06 10:52:57,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:52:57,604 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:52:57,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1527865935] [2021-05-06 10:52:57,604 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 10:52:57,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:52:57,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 10:52:57,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:52:57,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:52:57,843 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 10:52:57,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:52:57,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694926286] [2021-05-06 10:52:57,843 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:52:57,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527865935] [2021-05-06 10:52:57,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527865935] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:52:57,844 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:52:57,844 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 10:52:57,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254972159] [2021-05-06 10:52:57,844 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 10:52:57,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:52:57,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 10:52:57,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:52:57,845 INFO L87 Difference]: Start difference. First operand 31 states and 34 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 10:52:57,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:52:57,926 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2021-05-06 10:52:57,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 10:52:57,927 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2021-05-06 10:52:57,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:52:57,928 INFO L225 Difference]: With dead ends: 40 [2021-05-06 10:52:57,928 INFO L226 Difference]: Without dead ends: 40 [2021-05-06 10:52:57,928 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.6ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 10:52:57,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-05-06 10:52:57,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2021-05-06 10:52:57,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 25 states have internal predecessors, (26), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 10:52:57,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2021-05-06 10:52:57,934 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 29 [2021-05-06 10:52:57,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:52:57,934 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2021-05-06 10:52:57,934 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 10:52:57,934 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2021-05-06 10:52:57,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-06 10:52:57,935 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:52:57,936 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:52:58,144 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:52:58,145 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:52:58,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:52:58,146 INFO L82 PathProgramCache]: Analyzing trace with hash 1813677706, now seen corresponding path program 2 times [2021-05-06 10:52:58,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:52:58,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700139065] [2021-05-06 10:52:58,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:52:58,158 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:52:58,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [653465822] [2021-05-06 10:52:58,158 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 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 10:52:58,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 10:52:58,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:52:58,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 10:52:58,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:52:58,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:52:58,506 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-05-06 10:52:58,506 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:52:58,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700139065] [2021-05-06 10:52:58,507 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:52:58,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653465822] [2021-05-06 10:52:58,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653465822] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:52:58,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:52:58,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 10:52:58,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839751491] [2021-05-06 10:52:58,508 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 10:52:58,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:52:58,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 10:52:58,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 10:52:58,509 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 10:52:58,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:52:58,575 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2021-05-06 10:52:58,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 10:52:58,576 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 36 [2021-05-06 10:52:58,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:52:58,577 INFO L225 Difference]: With dead ends: 49 [2021-05-06 10:52:58,577 INFO L226 Difference]: Without dead ends: 49 [2021-05-06 10:52:58,577 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.0ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 10:52:58,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-05-06 10:52:58,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2021-05-06 10:52:58,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 31 states have internal predecessors, (32), 12 states have call successors, (12), 7 states have call predecessors, (12), 6 states have return successors, (10), 8 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 10:52:58,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2021-05-06 10:52:58,583 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 36 [2021-05-06 10:52:58,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:52:58,584 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2021-05-06 10:52:58,584 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 10:52:58,584 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2021-05-06 10:52:58,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-06 10:52:58,585 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:52:58,585 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:52:58,791 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:52:58,791 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:52:58,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:52:58,792 INFO L82 PathProgramCache]: Analyzing trace with hash 1285656823, now seen corresponding path program 1 times [2021-05-06 10:52:58,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:52:58,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561872341] [2021-05-06 10:52:58,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:52:58,817 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:52:58,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1928777783] [2021-05-06 10:52:58,818 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 10:52:58,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:52:58,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 10:52:58,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:52:58,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:52:58,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:52:58,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:52:58,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:52:59,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:52:59,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:52:59,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:52:59,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:52:59,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:52:59,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:52:59,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:52:59,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:52:59,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:52:59,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:52:59,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:52:59,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:03,336 WARN L205 SmtUtils]: Spent 4.22 s on a formula simplification. DAG size of input: 24 DAG size of output: 8 [2021-05-06 10:53:03,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:03,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:03,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:03,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:03,377 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-05-06 10:53:03,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:53:03,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561872341] [2021-05-06 10:53:03,378 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:53:03,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928777783] [2021-05-06 10:53:03,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928777783] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:53:03,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:53:03,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 10:53:03,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770699842] [2021-05-06 10:53:03,378 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 10:53:03,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:53:03,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 10:53:03,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 10:53:03,379 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand has 10 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-05-06 10:53:03,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:53:03,604 INFO L93 Difference]: Finished difference Result 52 states and 58 transitions. [2021-05-06 10:53:03,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 10:53:03,604 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 40 [2021-05-06 10:53:03,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:53:03,606 INFO L225 Difference]: With dead ends: 52 [2021-05-06 10:53:03,606 INFO L226 Difference]: Without dead ends: 46 [2021-05-06 10:53:03,607 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 4321.5ms TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-05-06 10:53:03,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-06 10:53:03,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-05-06 10:53:03,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 30 states have internal predecessors, (31), 11 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 10:53:03,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2021-05-06 10:53:03,611 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 40 [2021-05-06 10:53:03,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:53:03,611 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2021-05-06 10:53:03,611 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-05-06 10:53:03,611 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2021-05-06 10:53:03,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-06 10:53:03,612 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:53:03,612 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:53:03,832 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:53:03,833 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:53:03,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:53:03,833 INFO L82 PathProgramCache]: Analyzing trace with hash -241657738, now seen corresponding path program 3 times [2021-05-06 10:53:03,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:53:03,834 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458872682] [2021-05-06 10:53:03,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:53:03,843 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:53:03,844 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1827210766] [2021-05-06 10:53:03,844 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 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 10:53:04,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-06 10:53:04,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:53:04,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 10:53:04,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:53:04,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:04,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:04,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:04,790 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-05-06 10:53:04,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:53:04,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458872682] [2021-05-06 10:53:04,791 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:53:04,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827210766] [2021-05-06 10:53:04,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827210766] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:53:04,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:53:04,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 10:53:04,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569208096] [2021-05-06 10:53:04,791 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 10:53:04,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:53:04,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 10:53:04,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-06 10:53:04,792 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-06 10:53:04,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:53:04,853 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2021-05-06 10:53:04,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 10:53:04,853 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 43 [2021-05-06 10:53:04,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:53:04,856 INFO L225 Difference]: With dead ends: 50 [2021-05-06 10:53:04,856 INFO L226 Difference]: Without dead ends: 48 [2021-05-06 10:53:04,856 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 42.9ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-06 10:53:04,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-06 10:53:04,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 40. [2021-05-06 10:53:04,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 25 states have (on average 1.04) internal successors, (26), 25 states have internal predecessors, (26), 9 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 10:53:04,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2021-05-06 10:53:04,871 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 43 [2021-05-06 10:53:04,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:53:04,872 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2021-05-06 10:53:04,872 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-06 10:53:04,872 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2021-05-06 10:53:04,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-06 10:53:04,877 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:53:04,877 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:53:05,083 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-06 10:53:05,084 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:53:05,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:53:05,084 INFO L82 PathProgramCache]: Analyzing trace with hash -542323485, now seen corresponding path program 2 times [2021-05-06 10:53:05,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:53:05,084 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866688281] [2021-05-06 10:53:05,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:53:05,094 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:53:05,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1658483103] [2021-05-06 10:53:05,094 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 [2021-05-06 10:53:05,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 10:53:05,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:53:05,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-06 10:53:05,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:53:05,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:05,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:05,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:05,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:05,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:05,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:05,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:05,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:05,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:05,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:05,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:05,354 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-06 10:53:05,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:53:05,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866688281] [2021-05-06 10:53:05,355 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:53:05,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658483103] [2021-05-06 10:53:05,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658483103] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:53:05,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:53:05,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 10:53:05,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685017040] [2021-05-06 10:53:05,356 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 10:53:05,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:53:05,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 10:53:05,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 10:53:05,357 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2021-05-06 10:53:05,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:53:05,431 INFO L93 Difference]: Finished difference Result 47 states and 51 transitions. [2021-05-06 10:53:05,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 10:53:05,431 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 47 [2021-05-06 10:53:05,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:53:05,432 INFO L225 Difference]: With dead ends: 47 [2021-05-06 10:53:05,432 INFO L226 Difference]: Without dead ends: 43 [2021-05-06 10:53:05,432 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 55.5ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-06 10:53:05,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-06 10:53:05,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-05-06 10:53:05,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 27 states have (on average 1.037037037037037) internal successors, (28), 27 states have internal predecessors, (28), 10 states have call successors, (10), 7 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 10:53:05,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2021-05-06 10:53:05,436 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 47 [2021-05-06 10:53:05,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:53:05,436 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2021-05-06 10:53:05,436 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2021-05-06 10:53:05,436 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2021-05-06 10:53:05,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-06 10:53:05,437 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:53:05,437 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:53:05,651 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:53:05,651 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:53:05,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:53:05,652 INFO L82 PathProgramCache]: Analyzing trace with hash -2094100617, now seen corresponding path program 3 times [2021-05-06 10:53:05,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:53:05,652 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622327641] [2021-05-06 10:53:05,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:53:05,664 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:53:05,664 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1842901324] [2021-05-06 10:53:05,664 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 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 10:53:05,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 10:53:05,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:53:05,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-06 10:53:05,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:53:06,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:06,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:06,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:06,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:06,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:06,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:06,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:06,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:06,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:06,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:06,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:06,175 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-05-06 10:53:06,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:53:06,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622327641] [2021-05-06 10:53:06,178 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:53:06,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842901324] [2021-05-06 10:53:06,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842901324] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:53:06,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:53:06,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 10:53:06,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449028955] [2021-05-06 10:53:06,179 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 10:53:06,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:53:06,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 10:53:06,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-05-06 10:53:06,180 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2021-05-06 10:53:06,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:53:06,275 INFO L93 Difference]: Finished difference Result 50 states and 55 transitions. [2021-05-06 10:53:06,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 10:53:06,276 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 54 [2021-05-06 10:53:06,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:53:06,276 INFO L225 Difference]: With dead ends: 50 [2021-05-06 10:53:06,277 INFO L226 Difference]: Without dead ends: 46 [2021-05-06 10:53:06,277 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 88.0ms TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-06 10:53:06,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-06 10:53:06,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-05-06 10:53:06,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 29 states have (on average 1.0344827586206897) internal successors, (30), 29 states have internal predecessors, (30), 11 states have call successors, (11), 7 states have call predecessors, (11), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 10:53:06,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2021-05-06 10:53:06,280 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 54 [2021-05-06 10:53:06,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:53:06,280 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2021-05-06 10:53:06,280 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2021-05-06 10:53:06,281 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2021-05-06 10:53:06,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-06 10:53:06,281 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:53:06,281 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:53:06,489 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-06 10:53:06,491 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:53:06,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:53:06,492 INFO L82 PathProgramCache]: Analyzing trace with hash -826507677, now seen corresponding path program 4 times [2021-05-06 10:53:06,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:53:06,492 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754373790] [2021-05-06 10:53:06,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:53:06,501 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:53:06,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1061941135] [2021-05-06 10:53:06,501 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2021-05-06 10:53:06,549 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 10:53:06,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:53:06,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-06 10:53:06,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:53:06,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:06,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:06,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:06,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:06,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:06,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:06,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:06,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:06,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:06,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:06,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:06,742 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-05-06 10:53:06,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:53:06,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754373790] [2021-05-06 10:53:06,743 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:53:06,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061941135] [2021-05-06 10:53:06,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061941135] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:53:06,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:53:06,743 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 10:53:06,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468980161] [2021-05-06 10:53:06,743 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 10:53:06,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:53:06,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 10:53:06,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-05-06 10:53:06,744 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-05-06 10:53:06,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:53:06,864 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2021-05-06 10:53:06,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 10:53:06,865 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 61 [2021-05-06 10:53:06,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:53:06,866 INFO L225 Difference]: With dead ends: 53 [2021-05-06 10:53:06,866 INFO L226 Difference]: Without dead ends: 49 [2021-05-06 10:53:06,866 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 71.6ms TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-05-06 10:53:06,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-05-06 10:53:06,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-05-06 10:53:06,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 31 states have (on average 1.032258064516129) internal successors, (32), 31 states have internal predecessors, (32), 12 states have call successors, (12), 7 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 10:53:06,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2021-05-06 10:53:06,869 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 61 [2021-05-06 10:53:06,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:53:06,870 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2021-05-06 10:53:06,870 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-05-06 10:53:06,870 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2021-05-06 10:53:06,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-06 10:53:06,870 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:53:06,871 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:53:07,094 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-06 10:53:07,094 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:53:07,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:53:07,095 INFO L82 PathProgramCache]: Analyzing trace with hash -170119689, now seen corresponding path program 5 times [2021-05-06 10:53:07,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:53:07,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833852733] [2021-05-06 10:53:07,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:53:07,101 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:53:07,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2133700677] [2021-05-06 10:53:07,101 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:53:07,725 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-06 10:53:07,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:53:07,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-06 10:53:07,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:53:07,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:07,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:07,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:07,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:07,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:07,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:07,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:07,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:07,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:07,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:07,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:07,965 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 14 proven. 45 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-05-06 10:53:07,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:53:07,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833852733] [2021-05-06 10:53:07,966 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:53:07,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133700677] [2021-05-06 10:53:07,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133700677] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:53:07,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:53:07,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 10:53:07,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703112406] [2021-05-06 10:53:07,967 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 10:53:07,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:53:07,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 10:53:07,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-05-06 10:53:07,968 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand has 11 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 8 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2021-05-06 10:53:08,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:53:08,103 INFO L93 Difference]: Finished difference Result 56 states and 63 transitions. [2021-05-06 10:53:08,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 10:53:08,103 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 8 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) Word has length 68 [2021-05-06 10:53:08,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:53:08,104 INFO L225 Difference]: With dead ends: 56 [2021-05-06 10:53:08,104 INFO L226 Difference]: Without dead ends: 52 [2021-05-06 10:53:08,105 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 110.8ms TimeCoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-05-06 10:53:08,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-05-06 10:53:08,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-05-06 10:53:08,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 33 states have (on average 1.0303030303030303) internal successors, (34), 33 states have internal predecessors, (34), 13 states have call successors, (13), 7 states have call predecessors, (13), 5 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 10:53:08,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 58 transitions. [2021-05-06 10:53:08,108 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 58 transitions. Word has length 68 [2021-05-06 10:53:08,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:53:08,109 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 58 transitions. [2021-05-06 10:53:08,109 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 8 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2021-05-06 10:53:08,109 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 58 transitions. [2021-05-06 10:53:08,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-06 10:53:08,110 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:53:08,110 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:53:08,318 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:53:08,318 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:53:08,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:53:08,318 INFO L82 PathProgramCache]: Analyzing trace with hash 1505202147, now seen corresponding path program 6 times [2021-05-06 10:53:08,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:53:08,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069283665] [2021-05-06 10:53:08,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:53:08,327 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:53:08,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [218840154] [2021-05-06 10:53:08,327 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:53:08,593 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-06 10:53:08,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:53:08,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 10:53:08,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:53:08,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:08,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:08,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:08,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:08,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:08,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:08,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:08,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:08,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:08,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:08,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:08,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:08,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:08,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:08,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:08,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:08,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:08,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:08,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:08,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:08,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:08,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:08,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:08,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:08,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:08,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:08,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:08,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:08,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:08,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:08,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:08,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:08,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:08,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:08,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:08,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:08,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:08,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:08,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:08,851 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 123 proven. 3 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-05-06 10:53:08,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:53:08,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069283665] [2021-05-06 10:53:08,851 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:53:08,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218840154] [2021-05-06 10:53:08,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218840154] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:53:08,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:53:08,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 10:53:08,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332415951] [2021-05-06 10:53:08,852 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 10:53:08,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:53:08,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 10:53:08,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-06 10:53:08,853 INFO L87 Difference]: Start difference. First operand 52 states and 58 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 9 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2021-05-06 10:53:08,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:53:08,914 INFO L93 Difference]: Finished difference Result 45 states and 48 transitions. [2021-05-06 10:53:08,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 10:53:08,915 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 9 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) Word has length 75 [2021-05-06 10:53:08,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:53:08,915 INFO L225 Difference]: With dead ends: 45 [2021-05-06 10:53:08,915 INFO L226 Difference]: Without dead ends: 0 [2021-05-06 10:53:08,916 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 76.2ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-05-06 10:53:08,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-06 10:53:08,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-06 10:53:08,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-06 10:53:08,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-06 10:53:08,917 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 75 [2021-05-06 10:53:08,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:53:08,917 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-06 10:53:08,917 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 9 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2021-05-06 10:53:08,917 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-06 10:53:08,917 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-06 10:53:09,122 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-06 10:53:09,126 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 10:53:09 BasicIcfg [2021-05-06 10:53:09,126 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 10:53:09,127 INFO L168 Benchmark]: Toolchain (without parser) took 15160.26 ms. Allocated memory was 176.2 MB in the beginning and 211.8 MB in the end (delta: 35.7 MB). Free memory was 141.5 MB in the beginning and 180.3 MB in the end (delta: -38.8 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 10:53:09,127 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 176.2 MB. Free memory is still 157.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 10:53:09,127 INFO L168 Benchmark]: CACSL2BoogieTranslator took 166.33 ms. Allocated memory is still 176.2 MB. Free memory was 141.3 MB in the beginning and 131.5 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-06 10:53:09,127 INFO L168 Benchmark]: Boogie Preprocessor took 50.50 ms. Allocated memory is still 176.2 MB. Free memory was 131.4 MB in the beginning and 159.4 MB in the end (delta: -28.0 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2021-05-06 10:53:09,127 INFO L168 Benchmark]: RCFGBuilder took 297.30 ms. Allocated memory is still 176.2 MB. Free memory was 159.4 MB in the beginning and 145.2 MB in the end (delta: 14.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-06 10:53:09,127 INFO L168 Benchmark]: IcfgTransformer took 35.68 ms. Allocated memory is still 176.2 MB. Free memory was 144.8 MB in the beginning and 143.7 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 10:53:09,127 INFO L168 Benchmark]: TraceAbstraction took 14602.62 ms. Allocated memory was 176.2 MB in the beginning and 211.8 MB in the end (delta: 35.7 MB). Free memory was 143.5 MB in the beginning and 180.3 MB in the end (delta: -36.8 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 10:53:09,128 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 176.2 MB. Free memory is still 157.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 166.33 ms. Allocated memory is still 176.2 MB. Free memory was 141.3 MB in the beginning and 131.5 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 50.50 ms. Allocated memory is still 176.2 MB. Free memory was 131.4 MB in the beginning and 159.4 MB in the end (delta: -28.0 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 297.30 ms. Allocated memory is still 176.2 MB. Free memory was 159.4 MB in the beginning and 145.2 MB in the end (delta: 14.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * IcfgTransformer took 35.68 ms. Allocated memory is still 176.2 MB. Free memory was 144.8 MB in the beginning and 143.7 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 14602.62 ms. Allocated memory was 176.2 MB in the beginning and 211.8 MB in the end (delta: 35.7 MB). Free memory was 143.5 MB in the beginning and 180.3 MB in the end (delta: -36.8 MB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 12]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 14559.7ms, OverallIterations: 11, TraceHistogramMax: 9, EmptinessCheckTime: 21.2ms, AutomataDifference: 3216.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 334 SDtfs, 71 SDslu, 1524 SDs, 0 SdLazy, 694 SolverSat, 34 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 2757.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 492 GetRequests, 410 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 4881.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=52occurred in iteration=10, InterpolantAutomatonStates: 87, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 69.6ms AutomataMinimizationTime, 11 MinimizatonAttempts, 11 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 116.2ms SsaConstructionTime, 2140.5ms SatisfiabilityAnalysisTime, 6218.6ms InterpolantComputationTime, 497 NumberOfCodeBlocks, 474 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 486 ConstructedInterpolants, 0 QuantifiedInterpolants, 1511 SizeOfPredicates, 19 NumberOfNonLiveVariables, 1588 ConjunctsInSsa, 164 ConjunctsInUnsatCore, 11 InterpolantComputations, 2 PerfectInterpolantSequences, 543/662 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...