/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/cohendiv-ll_valuebound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 07:26:30,628 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 07:26:30,629 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 07:26:30,653 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 07:26:30,670 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 07:26:30,672 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 07:26:30,673 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 07:26:30,674 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 07:26:30,676 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 07:26:30,676 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 07:26:30,678 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 07:26:30,683 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 07:26:30,684 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 07:26:30,685 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 07:26:30,687 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 07:26:30,689 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 07:26:30,692 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 07:26:30,696 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 07:26:30,697 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 07:26:30,697 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 07:26:30,700 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 07:26:30,714 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 07:26:30,714 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 07:26:30,717 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 07:26:30,717 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 07:26:30,717 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 07:26:30,717 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 07:26:30,718 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 07:26:30,718 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 07:26:30,718 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 07:26:30,718 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 07:26:30,719 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 07:26:30,719 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 07:26:30,719 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 07:26:30,719 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 07:26:30,719 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 07:26:30,719 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 07:26:30,719 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 07:26:30,719 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 07:26:30,720 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 07:26:30,720 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 07:26:30,720 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 07:26:30,721 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 07:26:30,721 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 07:26:30,951 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 07:26:30,972 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 07:26:30,974 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 07:26:30,975 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 07:26:30,975 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 07:26:30,976 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_valuebound2.c [2021-05-06 07:26:31,015 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/401b858a2/46c1b41ca93244adba77b3c74f4766ee/FLAGc2e124086 [2021-05-06 07:26:31,363 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 07:26:31,363 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_valuebound2.c [2021-05-06 07:26:31,367 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/401b858a2/46c1b41ca93244adba77b3c74f4766ee/FLAGc2e124086 [2021-05-06 07:26:31,798 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/401b858a2/46c1b41ca93244adba77b3c74f4766ee [2021-05-06 07:26:31,800 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 07:26:31,801 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 07:26:31,802 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 07:26:31,802 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 07:26:31,812 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 07:26:31,812 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 07:26:31" (1/1) ... [2021-05-06 07:26:31,813 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6be2c09b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:26:31, skipping insertion in model container [2021-05-06 07:26:31,813 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 07:26:31" (1/1) ... [2021-05-06 07:26:31,819 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 07:26:31,828 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 07:26:31,919 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/cohendiv-ll_valuebound2.c[576,589] [2021-05-06 07:26:31,937 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 07:26:31,945 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 07:26:31,983 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/cohendiv-ll_valuebound2.c[576,589] [2021-05-06 07:26:31,990 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 07:26:32,000 INFO L208 MainTranslator]: Completed translation [2021-05-06 07:26:32,001 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:26:32 WrapperNode [2021-05-06 07:26:32,001 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 07:26:32,002 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 07:26:32,002 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 07:26:32,002 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 07:26:32,009 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:26:32" (1/1) ... [2021-05-06 07:26:32,009 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:26:32" (1/1) ... [2021-05-06 07:26:32,013 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:26:32" (1/1) ... [2021-05-06 07:26:32,013 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:26:32" (1/1) ... [2021-05-06 07:26:32,016 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:26:32" (1/1) ... [2021-05-06 07:26:32,019 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:26:32" (1/1) ... [2021-05-06 07:26:32,019 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:26:32" (1/1) ... [2021-05-06 07:26:32,020 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 07:26:32,021 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 07:26:32,021 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 07:26:32,021 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 07:26:32,022 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:26:32" (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 07:26:32,077 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 07:26:32,077 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 07:26:32,077 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 07:26:32,077 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 07:26:32,077 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 07:26:32,078 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 07:26:32,078 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 07:26:32,078 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 07:26:32,078 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 07:26:32,078 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 07:26:32,078 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 07:26:32,078 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 07:26:32,078 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 07:26:32,079 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 07:26:32,079 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 07:26:32,079 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 07:26:32,079 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 07:26:32,079 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 07:26:32,080 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 07:26:32,080 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 07:26:32,323 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 07:26:32,323 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 07:26:32,324 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:26:32 BoogieIcfgContainer [2021-05-06 07:26:32,324 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 07:26:32,324 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 07:26:32,324 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 07:26:32,325 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 07:26:32,327 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:26:32" (1/1) ... [2021-05-06 07:26:32,337 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 07:26:32 BasicIcfg [2021-05-06 07:26:32,337 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 07:26:32,353 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 07:26:32,353 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 07:26:32,355 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 07:26:32,355 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 07:26:31" (1/4) ... [2021-05-06 07:26:32,356 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ac42f0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 07:26:32, skipping insertion in model container [2021-05-06 07:26:32,356 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:26:32" (2/4) ... [2021-05-06 07:26:32,356 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ac42f0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 07:26:32, skipping insertion in model container [2021-05-06 07:26:32,356 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:26:32" (3/4) ... [2021-05-06 07:26:32,356 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ac42f0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 07:26:32, skipping insertion in model container [2021-05-06 07:26:32,356 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 07:26:32" (4/4) ... [2021-05-06 07:26:32,357 INFO L111 eAbstractionObserver]: Analyzing ICFG cohendiv-ll_valuebound2.cJordan [2021-05-06 07:26:32,361 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 07:26:32,363 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 07:26:32,374 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 07:26:32,387 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 07:26:32,387 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 07:26:32,387 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 07:26:32,387 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 07:26:32,387 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 07:26:32,388 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 07:26:32,388 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 07:26:32,388 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 07:26:32,399 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 22 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 07:26:32,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 07:26:32,404 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:26:32,404 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:26:32,404 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:26:32,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:26:32,407 INFO L82 PathProgramCache]: Analyzing trace with hash 795680375, now seen corresponding path program 1 times [2021-05-06 07:26:32,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:26:32,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313792027] [2021-05-06 07:26:32,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:26:32,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:26:32,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 07:26:32,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:26:32,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 07:26:32,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:26:32,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 07:26:32,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:26:32,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 07:26:32,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:26:32,604 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 07:26:32,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:26:32,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313792027] [2021-05-06 07:26:32,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313792027] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:26:32,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:26:32,606 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 07:26:32,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423523689] [2021-05-06 07:26:32,609 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 07:26:32,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:26:32,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 07:26:32,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 07:26:32,618 INFO L87 Difference]: Start difference. First operand has 39 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 22 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 07:26:32,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:26:32,731 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2021-05-06 07:26:32,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 07:26:32,733 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2021-05-06 07:26:32,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:26:32,738 INFO L225 Difference]: With dead ends: 39 [2021-05-06 07:26:32,738 INFO L226 Difference]: Without dead ends: 34 [2021-05-06 07:26:32,739 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 07:26:32,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-06 07:26:32,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-05-06 07:26:32,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 07:26:32,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2021-05-06 07:26:32,773 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 28 [2021-05-06 07:26:32,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:26:32,774 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2021-05-06 07:26:32,774 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 07:26:32,774 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2021-05-06 07:26:32,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 07:26:32,775 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:26:32,775 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:26:32,775 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 07:26:32,775 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:26:32,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:26:32,776 INFO L82 PathProgramCache]: Analyzing trace with hash 797557208, now seen corresponding path program 1 times [2021-05-06 07:26:32,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:26:32,776 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739112776] [2021-05-06 07:26:32,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:26:32,789 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:26:32,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [662063478] [2021-05-06 07:26:32,789 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 07:26:32,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:26:32,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 07:26:32,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:26:33,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:33,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:33,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:33,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:33,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:33,153 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-06 07:26:33,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:26:33,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739112776] [2021-05-06 07:26:33,153 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:26:33,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662063478] [2021-05-06 07:26:33,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662063478] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:26:33,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:26:33,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-06 07:26:33,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78123131] [2021-05-06 07:26:33,155 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 07:26:33,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:26:33,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 07:26:33,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-06 07:26:33,156 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand has 9 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 07:26:33,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:26:33,327 INFO L93 Difference]: Finished difference Result 43 states and 54 transitions. [2021-05-06 07:26:33,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 07:26:33,328 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2021-05-06 07:26:33,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:26:33,331 INFO L225 Difference]: With dead ends: 43 [2021-05-06 07:26:33,331 INFO L226 Difference]: Without dead ends: 43 [2021-05-06 07:26:33,333 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 114.1ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-06 07:26:33,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-06 07:26:33,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2021-05-06 07:26:33,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 24 states have internal predecessors, (25), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 07:26:33,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2021-05-06 07:26:33,351 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 28 [2021-05-06 07:26:33,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:26:33,351 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2021-05-06 07:26:33,351 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 07:26:33,352 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2021-05-06 07:26:33,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-06 07:26:33,352 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:26:33,352 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:26:33,553 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 07:26:33,553 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:26:33,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:26:33,554 INFO L82 PathProgramCache]: Analyzing trace with hash 648866686, now seen corresponding path program 1 times [2021-05-06 07:26:33,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:26:33,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799896099] [2021-05-06 07:26:33,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:26:33,565 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:26:33,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1966581992] [2021-05-06 07:26:33,565 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 07:26:33,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:26:33,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 07:26:33,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:26:33,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:33,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:33,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:33,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:33,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:33,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:33,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:33,840 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-06 07:26:33,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:26:33,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799896099] [2021-05-06 07:26:33,840 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:26:33,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966581992] [2021-05-06 07:26:33,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966581992] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:26:33,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:26:33,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-06 07:26:33,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196087948] [2021-05-06 07:26:33,841 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 07:26:33,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:26:33,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 07:26:33,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-06 07:26:33,842 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand has 9 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 07:26:33,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:26:33,984 INFO L93 Difference]: Finished difference Result 55 states and 70 transitions. [2021-05-06 07:26:33,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 07:26:33,984 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 33 [2021-05-06 07:26:33,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:26:33,985 INFO L225 Difference]: With dead ends: 55 [2021-05-06 07:26:33,985 INFO L226 Difference]: Without dead ends: 54 [2021-05-06 07:26:33,986 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 73.2ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-06 07:26:33,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-06 07:26:33,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2021-05-06 07:26:33,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 18 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-06 07:26:33,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 67 transitions. [2021-05-06 07:26:33,991 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 67 transitions. Word has length 33 [2021-05-06 07:26:33,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:26:33,991 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 67 transitions. [2021-05-06 07:26:33,991 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 07:26:33,991 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 67 transitions. [2021-05-06 07:26:33,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-06 07:26:33,992 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:26:33,992 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:26:34,207 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:26:34,207 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:26:34,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:26:34,208 INFO L82 PathProgramCache]: Analyzing trace with hash 619469170, now seen corresponding path program 1 times [2021-05-06 07:26:34,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:26:34,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668214925] [2021-05-06 07:26:34,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:26:34,220 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:26:34,220 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2141741478] [2021-05-06 07:26:34,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:26:34,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:26:34,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 07:26:34,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:26:34,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:34,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:34,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:34,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:34,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:34,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:34,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:34,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:34,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:34,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:34,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:34,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:34,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:34,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:34,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:34,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:34,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:34,489 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-05-06 07:26:34,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:26:34,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668214925] [2021-05-06 07:26:34,489 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:26:34,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141741478] [2021-05-06 07:26:34,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141741478] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:26:34,489 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:26:34,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 07:26:34,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666533315] [2021-05-06 07:26:34,490 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 07:26:34,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:26:34,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 07:26:34,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-05-06 07:26:34,491 INFO L87 Difference]: Start difference. First operand 53 states and 67 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 07:26:34,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:26:34,684 INFO L93 Difference]: Finished difference Result 85 states and 116 transitions. [2021-05-06 07:26:34,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 07:26:34,685 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 40 [2021-05-06 07:26:34,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:26:34,687 INFO L225 Difference]: With dead ends: 85 [2021-05-06 07:26:34,687 INFO L226 Difference]: Without dead ends: 85 [2021-05-06 07:26:34,689 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 87.4ms TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-05-06 07:26:34,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-05-06 07:26:34,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 72. [2021-05-06 07:26:34,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 40 states have internal predecessors, (46), 26 states have call successors, (26), 7 states have call predecessors, (26), 6 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-06 07:26:34,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 96 transitions. [2021-05-06 07:26:34,709 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 96 transitions. Word has length 40 [2021-05-06 07:26:34,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:26:34,710 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 96 transitions. [2021-05-06 07:26:34,710 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 07:26:34,710 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 96 transitions. [2021-05-06 07:26:34,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-06 07:26:34,710 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:26:34,711 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:26:34,928 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:26:34,929 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:26:34,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:26:34,929 INFO L82 PathProgramCache]: Analyzing trace with hash -574143214, now seen corresponding path program 1 times [2021-05-06 07:26:34,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:26:34,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90979788] [2021-05-06 07:26:34,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:26:34,948 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:26:34,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1842722678] [2021-05-06 07:26:34,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:26:34,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:26:34,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 07:26:34,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:26:35,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:35,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:35,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:35,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:35,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:35,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:35,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:35,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:35,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:35,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:35,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:35,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:35,112 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-05-06 07:26:35,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:26:35,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90979788] [2021-05-06 07:26:35,112 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:26:35,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842722678] [2021-05-06 07:26:35,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842722678] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:26:35,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:26:35,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-06 07:26:35,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439414009] [2021-05-06 07:26:35,113 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 07:26:35,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:26:35,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 07:26:35,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 07:26:35,114 INFO L87 Difference]: Start difference. First operand 72 states and 96 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 07:26:35,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:26:35,200 INFO L93 Difference]: Finished difference Result 76 states and 99 transitions. [2021-05-06 07:26:35,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 07:26:35,200 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 50 [2021-05-06 07:26:35,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:26:35,204 INFO L225 Difference]: With dead ends: 76 [2021-05-06 07:26:35,204 INFO L226 Difference]: Without dead ends: 76 [2021-05-06 07:26:35,205 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 44.2ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-06 07:26:35,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-05-06 07:26:35,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2021-05-06 07:26:35,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 42 states have (on average 1.1666666666666667) internal successors, (49), 43 states have internal predecessors, (49), 26 states have call successors, (26), 8 states have call predecessors, (26), 7 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-06 07:26:35,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 99 transitions. [2021-05-06 07:26:35,216 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 99 transitions. Word has length 50 [2021-05-06 07:26:35,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:26:35,216 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 99 transitions. [2021-05-06 07:26:35,216 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 07:26:35,216 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 99 transitions. [2021-05-06 07:26:35,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-05-06 07:26:35,217 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:26:35,217 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:26:35,427 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:26:35,427 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:26:35,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:26:35,427 INFO L82 PathProgramCache]: Analyzing trace with hash -810208713, now seen corresponding path program 1 times [2021-05-06 07:26:35,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:26:35,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976289558] [2021-05-06 07:26:35,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:26:35,436 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:26:35,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1669953528] [2021-05-06 07:26:35,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:26:35,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:26:35,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 07:26:35,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:26:35,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:35,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:35,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:35,594 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-06 07:26:35,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:26:35,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976289558] [2021-05-06 07:26:35,595 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:26:35,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669953528] [2021-05-06 07:26:35,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669953528] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:26:35,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:26:35,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 07:26:35,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045028432] [2021-05-06 07:26:35,596 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 07:26:35,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:26:35,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 07:26:35,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 07:26:35,596 INFO L87 Difference]: Start difference. First operand 76 states and 99 transitions. Second operand has 8 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-06 07:26:35,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:26:35,697 INFO L93 Difference]: Finished difference Result 80 states and 102 transitions. [2021-05-06 07:26:35,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 07:26:35,713 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 56 [2021-05-06 07:26:35,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:26:35,714 INFO L225 Difference]: With dead ends: 80 [2021-05-06 07:26:35,714 INFO L226 Difference]: Without dead ends: 80 [2021-05-06 07:26:35,714 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 50.8ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-06 07:26:35,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-05-06 07:26:35,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2021-05-06 07:26:35,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 46 states have internal predecessors, (52), 26 states have call successors, (26), 9 states have call predecessors, (26), 8 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-06 07:26:35,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 102 transitions. [2021-05-06 07:26:35,719 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 102 transitions. Word has length 56 [2021-05-06 07:26:35,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:26:35,719 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 102 transitions. [2021-05-06 07:26:35,720 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-06 07:26:35,720 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 102 transitions. [2021-05-06 07:26:35,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-05-06 07:26:35,720 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:26:35,721 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:26:35,921 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-06 07:26:35,921 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:26:35,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:26:35,922 INFO L82 PathProgramCache]: Analyzing trace with hash -1603019557, now seen corresponding path program 1 times [2021-05-06 07:26:35,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:26:35,922 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234485571] [2021-05-06 07:26:35,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:26:35,931 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:26:35,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1221174084] [2021-05-06 07:26:35,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:26:35,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:26:35,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 07:26:35,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:26:36,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:36,119 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-05-06 07:26:36,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:26:36,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234485571] [2021-05-06 07:26:36,119 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:26:36,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221174084] [2021-05-06 07:26:36,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221174084] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:26:36,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:26:36,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 07:26:36,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387224620] [2021-05-06 07:26:36,123 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 07:26:36,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:26:36,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 07:26:36,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-06 07:26:36,125 INFO L87 Difference]: Start difference. First operand 80 states and 102 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 07:26:36,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:26:36,227 INFO L93 Difference]: Finished difference Result 111 states and 144 transitions. [2021-05-06 07:26:36,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 07:26:36,228 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), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 63 [2021-05-06 07:26:36,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:26:36,229 INFO L225 Difference]: With dead ends: 111 [2021-05-06 07:26:36,229 INFO L226 Difference]: Without dead ends: 110 [2021-05-06 07:26:36,229 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 30.1ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-06 07:26:36,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-05-06 07:26:36,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 105. [2021-05-06 07:26:36,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 59 states have (on average 1.152542372881356) internal successors, (68), 60 states have internal predecessors, (68), 35 states have call successors, (35), 11 states have call predecessors, (35), 10 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2021-05-06 07:26:36,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 136 transitions. [2021-05-06 07:26:36,236 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 136 transitions. Word has length 63 [2021-05-06 07:26:36,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:26:36,237 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 136 transitions. [2021-05-06 07:26:36,237 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), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 07:26:36,237 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 136 transitions. [2021-05-06 07:26:36,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-05-06 07:26:36,238 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:26:36,238 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:26:36,456 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:26:36,457 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:26:36,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:26:36,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1439194403, now seen corresponding path program 1 times [2021-05-06 07:26:36,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:26:36,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597635542] [2021-05-06 07:26:36,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:26:36,466 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:26:36,467 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1590329490] [2021-05-06 07:26:36,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:26:36,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:26:36,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-06 07:26:36,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:26:36,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:36,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:36,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:36,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:36,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:36,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:36,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:36,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:36,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:36,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:36,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:36,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:36,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:36,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:36,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:36,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:36,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:36,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:36,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:36,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:36,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:36,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:36,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:36,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:36,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:36,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:36,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:36,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:36,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:36,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:36,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:36,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:36,944 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2021-05-06 07:26:36,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:26:36,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597635542] [2021-05-06 07:26:36,944 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:26:36,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590329490] [2021-05-06 07:26:36,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590329490] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:26:36,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:26:36,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 07:26:36,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965645632] [2021-05-06 07:26:36,945 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 07:26:36,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:26:36,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 07:26:36,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-05-06 07:26:36,946 INFO L87 Difference]: Start difference. First operand 105 states and 136 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) [2021-05-06 07:26:37,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:26:37,123 INFO L93 Difference]: Finished difference Result 129 states and 166 transitions. [2021-05-06 07:26:37,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 07:26:37,123 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) Word has length 86 [2021-05-06 07:26:37,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:26:37,124 INFO L225 Difference]: With dead ends: 129 [2021-05-06 07:26:37,124 INFO L226 Difference]: Without dead ends: 119 [2021-05-06 07:26:37,125 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 135.3ms TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-05-06 07:26:37,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-05-06 07:26:37,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 116. [2021-05-06 07:26:37,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 65 states have (on average 1.1384615384615384) internal successors, (74), 66 states have internal predecessors, (74), 39 states have call successors, (39), 12 states have call predecessors, (39), 11 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2021-05-06 07:26:37,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 150 transitions. [2021-05-06 07:26:37,130 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 150 transitions. Word has length 86 [2021-05-06 07:26:37,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:26:37,130 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 150 transitions. [2021-05-06 07:26:37,130 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) [2021-05-06 07:26:37,130 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 150 transitions. [2021-05-06 07:26:37,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-05-06 07:26:37,131 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:26:37,131 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:26:37,336 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:26:37,339 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:26:37,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:26:37,339 INFO L82 PathProgramCache]: Analyzing trace with hash -120599176, now seen corresponding path program 2 times [2021-05-06 07:26:37,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:26:37,339 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226703838] [2021-05-06 07:26:37,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:26:37,350 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:26:37,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1768150409] [2021-05-06 07:26:37,350 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 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 07:26:37,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 07:26:37,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 07:26:37,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-06 07:26:37,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:26:37,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:37,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:37,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:37,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:37,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:37,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:37,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:37,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:37,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:37,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:37,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:37,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:37,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:37,552 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 142 proven. 0 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-05-06 07:26:37,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:26:37,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226703838] [2021-05-06 07:26:37,553 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:26:37,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768150409] [2021-05-06 07:26:37,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768150409] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:26:37,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:26:37,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 07:26:37,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340370891] [2021-05-06 07:26:37,554 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 07:26:37,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:26:37,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 07:26:37,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 07:26:37,555 INFO L87 Difference]: Start difference. First operand 116 states and 150 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 4 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-05-06 07:26:37,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:26:37,598 INFO L93 Difference]: Finished difference Result 107 states and 131 transitions. [2021-05-06 07:26:37,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 07:26:37,599 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 4 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 93 [2021-05-06 07:26:37,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:26:37,599 INFO L225 Difference]: With dead ends: 107 [2021-05-06 07:26:37,600 INFO L226 Difference]: Without dead ends: 94 [2021-05-06 07:26:37,600 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 13.5ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 07:26:37,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-05-06 07:26:37,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 91. [2021-05-06 07:26:37,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 51 states have (on average 1.0980392156862746) internal successors, (56), 52 states have internal predecessors, (56), 30 states have call successors, (30), 10 states have call predecessors, (30), 9 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2021-05-06 07:26:37,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 114 transitions. [2021-05-06 07:26:37,604 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 114 transitions. Word has length 93 [2021-05-06 07:26:37,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:26:37,604 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 114 transitions. [2021-05-06 07:26:37,604 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 4 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-05-06 07:26:37,604 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 114 transitions. [2021-05-06 07:26:37,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-05-06 07:26:37,605 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:26:37,605 INFO L523 BasicCegarLoop]: trace histogram [15, 14, 14, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:26:37,821 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-06 07:26:37,821 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:26:37,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:26:37,822 INFO L82 PathProgramCache]: Analyzing trace with hash -2120729957, now seen corresponding path program 2 times [2021-05-06 07:26:37,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:26:37,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221456717] [2021-05-06 07:26:37,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:26:37,828 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:26:37,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1334602091] [2021-05-06 07:26:37,829 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 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 07:26:37,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 07:26:37,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 07:26:37,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 07:26:37,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:26:37,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:37,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:37,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:37,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:37,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:37,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:37,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:37,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:37,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:37,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:37,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:37,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:37,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:38,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:38,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:38,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:38,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:38,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:38,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:38,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:38,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:38,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:38,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:38,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:38,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:38,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:38,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:38,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:38,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:38,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:38,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:38,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:38,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:38,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:38,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:38,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:38,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:38,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:38,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:38,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:38,166 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 93 proven. 11 refuted. 0 times theorem prover too weak. 320 trivial. 0 not checked. [2021-05-06 07:26:38,167 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:26:38,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221456717] [2021-05-06 07:26:38,167 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:26:38,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334602091] [2021-05-06 07:26:38,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334602091] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:26:38,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:26:38,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 07:26:38,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386453890] [2021-05-06 07:26:38,168 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 07:26:38,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:26:38,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 07:26:38,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-06 07:26:38,169 INFO L87 Difference]: Start difference. First operand 91 states and 114 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2021-05-06 07:26:38,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:26:38,337 INFO L93 Difference]: Finished difference Result 64 states and 74 transitions. [2021-05-06 07:26:38,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 07:26:38,337 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) Word has length 109 [2021-05-06 07:26:38,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:26:38,338 INFO L225 Difference]: With dead ends: 64 [2021-05-06 07:26:38,338 INFO L226 Difference]: Without dead ends: 0 [2021-05-06 07:26:38,338 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 127.0ms TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-05-06 07:26:38,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-06 07:26:38,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-06 07:26:38,339 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 07:26:38,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-06 07:26:38,339 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 109 [2021-05-06 07:26:38,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:26:38,339 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-06 07:26:38,339 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2021-05-06 07:26:38,339 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-06 07:26:38,339 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-06 07:26:38,552 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:26:38,557 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 07:26:38 BasicIcfg [2021-05-06 07:26:38,557 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 07:26:38,558 INFO L168 Benchmark]: Toolchain (without parser) took 6756.90 ms. Allocated memory was 206.6 MB in the beginning and 248.5 MB in the end (delta: 41.9 MB). Free memory was 171.2 MB in the beginning and 134.1 MB in the end (delta: 37.2 MB). Peak memory consumption was 79.5 MB. Max. memory is 8.0 GB. [2021-05-06 07:26:38,558 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 206.6 MB. Free memory is still 187.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 07:26:38,558 INFO L168 Benchmark]: CACSL2BoogieTranslator took 199.29 ms. Allocated memory is still 206.6 MB. Free memory was 171.0 MB in the beginning and 189.3 MB in the end (delta: -18.3 MB). Peak memory consumption was 13.0 MB. Max. memory is 8.0 GB. [2021-05-06 07:26:38,558 INFO L168 Benchmark]: Boogie Preprocessor took 19.02 ms. Allocated memory is still 206.6 MB. Free memory was 189.3 MB in the beginning and 187.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 07:26:38,558 INFO L168 Benchmark]: RCFGBuilder took 302.82 ms. Allocated memory is still 206.6 MB. Free memory was 187.8 MB in the beginning and 171.5 MB in the end (delta: 16.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-05-06 07:26:38,558 INFO L168 Benchmark]: IcfgTransformer took 12.72 ms. Allocated memory is still 206.6 MB. Free memory was 171.5 MB in the beginning and 170.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 07:26:38,558 INFO L168 Benchmark]: TraceAbstraction took 6204.61 ms. Allocated memory was 206.6 MB in the beginning and 248.5 MB in the end (delta: 41.9 MB). Free memory was 169.4 MB in the beginning and 134.1 MB in the end (delta: 35.4 MB). Peak memory consumption was 78.0 MB. Max. memory is 8.0 GB. [2021-05-06 07:26:38,558 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 206.6 MB. Free memory is still 187.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 199.29 ms. Allocated memory is still 206.6 MB. Free memory was 171.0 MB in the beginning and 189.3 MB in the end (delta: -18.3 MB). Peak memory consumption was 13.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 19.02 ms. Allocated memory is still 206.6 MB. Free memory was 189.3 MB in the beginning and 187.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 302.82 ms. Allocated memory is still 206.6 MB. Free memory was 187.8 MB in the beginning and 171.5 MB in the end (delta: 16.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * IcfgTransformer took 12.72 ms. Allocated memory is still 206.6 MB. Free memory was 171.5 MB in the beginning and 170.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 6204.61 ms. Allocated memory was 206.6 MB in the beginning and 248.5 MB in the end (delta: 41.9 MB). Free memory was 169.4 MB in the beginning and 134.1 MB in the end (delta: 35.4 MB). Peak memory consumption was 78.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 17]: 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, 39 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 6167.6ms, OverallIterations: 10, TraceHistogramMax: 15, EmptinessCheckTime: 14.4ms, AutomataDifference: 1359.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 8.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 427 SDtfs, 250 SDslu, 1549 SDs, 0 SdLazy, 992 SolverSat, 181 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 759.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 583 GetRequests, 499 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 713.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=116occurred in iteration=8, InterpolantAutomatonStates: 82, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 84.2ms AutomataMinimizationTime, 10 MinimizatonAttempts, 28 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 80.2ms SsaConstructionTime, 275.4ms SatisfiabilityAnalysisTime, 1960.3ms InterpolantComputationTime, 586 NumberOfCodeBlocks, 586 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 576 ConstructedInterpolants, 0 QuantifiedInterpolants, 1650 SizeOfPredicates, 30 NumberOfNonLiveVariables, 1708 ConjunctsInSsa, 128 ConjunctsInUnsatCore, 10 InterpolantComputations, 5 PerfectInterpolantSequences, 1127/1165 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...