/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/hard-ll_valuebound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 20:52:42,787 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 20:52:42,788 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 20:52:42,817 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 20:52:42,817 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 20:52:42,818 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 20:52:42,819 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 20:52:42,820 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 20:52:42,821 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 20:52:42,822 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 20:52:42,822 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 20:52:42,823 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 20:52:42,823 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 20:52:42,824 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 20:52:42,825 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 20:52:42,825 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 20:52:42,826 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 20:52:42,826 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 20:52:42,828 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 20:52:42,829 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 20:52:42,830 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 20:52:42,835 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 20:52:42,837 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 20:52:42,838 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 20:52:42,843 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 20:52:42,848 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 20:52:42,848 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 20:52:42,849 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 20:52:42,858 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 20:52:42,867 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 20:52:42,867 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 20:52:42,868 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 20:52:42,868 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 20:52:42,868 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 20:52:42,868 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 20:52:42,868 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 20:52:42,868 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 20:52:42,868 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 20:52:42,868 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 20:52:42,869 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 20:52:42,869 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 20:52:42,869 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 20:52:42,869 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 20:52:42,869 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 20:52:42,869 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 20:52:42,869 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 20:52:42,869 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 20:52:42,869 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:52:42,870 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 20:52:42,870 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 20:52:42,870 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 20:52:42,870 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 20:52:43,086 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 20:52:43,100 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 20:52:43,101 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 20:52:43,102 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 20:52:43,103 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 20:52:43,103 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound1.c [2021-05-02 20:52:43,148 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f683c1d79/b7c1269d164b4bed9ff87d1c276260d0/FLAGe50fe04cf [2021-05-02 20:52:43,525 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 20:52:43,525 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound1.c [2021-05-02 20:52:43,531 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f683c1d79/b7c1269d164b4bed9ff87d1c276260d0/FLAGe50fe04cf [2021-05-02 20:52:43,543 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f683c1d79/b7c1269d164b4bed9ff87d1c276260d0 [2021-05-02 20:52:43,545 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 20:52:43,547 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 20:52:43,552 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 20:52:43,552 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 20:52:43,554 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 20:52:43,555 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:52:43" (1/1) ... [2021-05-02 20:52:43,555 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4711fd6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:52:43, skipping insertion in model container [2021-05-02 20:52:43,556 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:52:43" (1/1) ... [2021-05-02 20:52:43,560 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 20:52:43,574 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 20:52:43,682 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/hard-ll_valuebound1.c[546,559] [2021-05-02 20:52:43,703 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:52:43,711 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 20:52:43,754 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/hard-ll_valuebound1.c[546,559] [2021-05-02 20:52:43,766 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:52:43,777 INFO L208 MainTranslator]: Completed translation [2021-05-02 20:52:43,778 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:52:43 WrapperNode [2021-05-02 20:52:43,778 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 20:52:43,780 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 20:52:43,780 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 20:52:43,780 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 20:52:43,787 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:52:43" (1/1) ... [2021-05-02 20:52:43,787 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:52:43" (1/1) ... [2021-05-02 20:52:43,798 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:52:43" (1/1) ... [2021-05-02 20:52:43,799 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:52:43" (1/1) ... [2021-05-02 20:52:43,808 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:52:43" (1/1) ... [2021-05-02 20:52:43,811 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:52:43" (1/1) ... [2021-05-02 20:52:43,817 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:52:43" (1/1) ... [2021-05-02 20:52:43,819 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 20:52:43,819 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 20:52:43,820 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 20:52:43,820 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 20:52:43,820 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:52:43" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:52:43,881 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 20:52:43,881 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 20:52:43,881 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 20:52:43,881 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 20:52:43,881 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 20:52:43,881 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 20:52:43,881 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 20:52:43,882 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 20:52:43,882 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 20:52:43,882 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 20:52:43,882 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-02 20:52:43,882 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 20:52:43,882 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 20:52:43,882 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 20:52:43,882 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 20:52:43,882 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 20:52:43,882 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 20:52:43,882 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 20:52:43,882 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 20:52:43,882 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 20:52:44,094 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 20:52:44,094 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 20:52:44,095 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:52:44 BoogieIcfgContainer [2021-05-02 20:52:44,095 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 20:52:44,096 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 20:52:44,096 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 20:52:44,096 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 20:52:44,098 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:52:44" (1/1) ... [2021-05-02 20:52:44,129 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:52:44 BasicIcfg [2021-05-02 20:52:44,129 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 20:52:44,130 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 20:52:44,130 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 20:52:44,132 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 20:52:44,132 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 08:52:43" (1/4) ... [2021-05-02 20:52:44,133 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@641343ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:52:44, skipping insertion in model container [2021-05-02 20:52:44,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:52:43" (2/4) ... [2021-05-02 20:52:44,133 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@641343ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:52:44, skipping insertion in model container [2021-05-02 20:52:44,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:52:44" (3/4) ... [2021-05-02 20:52:44,134 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@641343ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:52:44, skipping insertion in model container [2021-05-02 20:52:44,134 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:52:44" (4/4) ... [2021-05-02 20:52:44,134 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-ll_valuebound1.cJordan [2021-05-02 20:52:44,137 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 20:52:44,140 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 20:52:44,152 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 20:52:44,167 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 20:52:44,167 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 20:52:44,167 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 20:52:44,167 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 20:52:44,167 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 20:52:44,167 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 20:52:44,167 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 20:52:44,167 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 20:52:44,176 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 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) [2021-05-02 20:52:44,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 20:52:44,180 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:52:44,181 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] [2021-05-02 20:52:44,181 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:52:44,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:52:44,186 INFO L82 PathProgramCache]: Analyzing trace with hash 1011787902, now seen corresponding path program 1 times [2021-05-02 20:52:44,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:52:44,191 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188667132] [2021-05-02 20:52:44,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:52:44,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:44,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 20:52:44,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:44,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 20:52:44,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:44,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 20:52:44,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:44,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 20:52:44,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:44,375 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 20:52:44,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:52:44,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188667132] [2021-05-02 20:52:44,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188667132] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:52:44,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:52:44,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 20:52:44,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741754826] [2021-05-02 20:52:44,379 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 20:52:44,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:52:44,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 20:52:44,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:52:44,388 INFO L87 Difference]: Start difference. First operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 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), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 20:52:44,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:52:44,467 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2021-05-02 20:52:44,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 20:52:44,469 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), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2021-05-02 20:52:44,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:52:44,474 INFO L225 Difference]: With dead ends: 38 [2021-05-02 20:52:44,474 INFO L226 Difference]: Without dead ends: 33 [2021-05-02 20:52:44,475 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 47.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:52:44,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-02 20:52:44,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-02 20:52:44,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 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) [2021-05-02 20:52:44,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2021-05-02 20:52:44,507 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 28 [2021-05-02 20:52:44,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:52:44,507 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2021-05-02 20:52:44,507 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), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 20:52:44,507 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2021-05-02 20:52:44,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 20:52:44,508 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:52:44,508 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] [2021-05-02 20:52:44,508 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 20:52:44,509 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:52:44,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:52:44,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1710049411, now seen corresponding path program 1 times [2021-05-02 20:52:44,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:52:44,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681136403] [2021-05-02 20:52:44,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:52:44,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:44,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 20:52:44,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:44,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 20:52:44,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:44,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 20:52:44,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:44,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 20:52:44,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:44,627 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 20:52:44,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:52:44,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681136403] [2021-05-02 20:52:44,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681136403] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:52:44,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:52:44,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 20:52:44,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482107057] [2021-05-02 20:52:44,629 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 20:52:44,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:52:44,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 20:52:44,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:52:44,630 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 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) [2021-05-02 20:52:44,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:52:44,893 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2021-05-02 20:52:44,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 20:52:44,894 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 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 [2021-05-02 20:52:44,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:52:44,895 INFO L225 Difference]: With dead ends: 44 [2021-05-02 20:52:44,895 INFO L226 Difference]: Without dead ends: 44 [2021-05-02 20:52:44,896 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 121.3ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:52:44,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-02 20:52:44,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2021-05-02 20:52:44,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 12 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 20:52:44,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2021-05-02 20:52:44,913 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 28 [2021-05-02 20:52:44,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:52:44,913 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2021-05-02 20:52:44,914 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 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) [2021-05-02 20:52:44,914 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2021-05-02 20:52:44,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 20:52:44,918 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:52:44,918 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] [2021-05-02 20:52:44,918 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 20:52:44,918 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:52:44,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:52:44,918 INFO L82 PathProgramCache]: Analyzing trace with hash 1042498848, now seen corresponding path program 1 times [2021-05-02 20:52:44,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:52:44,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55728066] [2021-05-02 20:52:44,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:52:44,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:44,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 20:52:44,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:44,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 20:52:44,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:44,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 20:52:44,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:44,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 20:52:44,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:44,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-05-02 20:52:44,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:45,008 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 20:52:45,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:52:45,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55728066] [2021-05-02 20:52:45,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55728066] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:52:45,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:52:45,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 20:52:45,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722903517] [2021-05-02 20:52:45,009 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 20:52:45,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:52:45,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 20:52:45,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:52:45,010 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:52:45,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:52:45,242 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2021-05-02 20:52:45,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 20:52:45,243 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-02 20:52:45,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:52:45,243 INFO L225 Difference]: With dead ends: 48 [2021-05-02 20:52:45,244 INFO L226 Difference]: Without dead ends: 48 [2021-05-02 20:52:45,244 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 112.0ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:52:45,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-02 20:52:45,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2021-05-02 20:52:45,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 12 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 20:52:45,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2021-05-02 20:52:45,247 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 33 [2021-05-02 20:52:45,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:52:45,248 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2021-05-02 20:52:45,248 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:52:45,248 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2021-05-02 20:52:45,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 20:52:45,249 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:52:45,249 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] [2021-05-02 20:52:45,249 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-02 20:52:45,249 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:52:45,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:52:45,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1436069466, now seen corresponding path program 1 times [2021-05-02 20:52:45,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:52:45,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842799550] [2021-05-02 20:52:45,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:52:45,275 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:52:45,276 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [309686672] [2021-05-02 20:52:45,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:52:45,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:45,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 20:52:45,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:52:45,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:45,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:45,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:45,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:45,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:45,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:45,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:45,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:45,706 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-05-02 20:52:45,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:52:45,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842799550] [2021-05-02 20:52:45,707 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:52:45,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309686672] [2021-05-02 20:52:45,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309686672] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:52:45,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:52:45,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 20:52:45,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326523909] [2021-05-02 20:52:45,707 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 20:52:45,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:52:45,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 20:52:45,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:52:45,708 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 12 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-05-02 20:52:45,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:52:45,875 INFO L93 Difference]: Finished difference Result 60 states and 73 transitions. [2021-05-02 20:52:45,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:52:45,875 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 38 [2021-05-02 20:52:45,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:52:45,876 INFO L225 Difference]: With dead ends: 60 [2021-05-02 20:52:45,876 INFO L226 Difference]: Without dead ends: 59 [2021-05-02 20:52:45,876 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 97.7ms TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:52:45,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-05-02 20:52:45,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-05-02 20:52:45,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 35 states have internal predecessors, (38), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 20:52:45,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 71 transitions. [2021-05-02 20:52:45,881 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 71 transitions. Word has length 38 [2021-05-02 20:52:45,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:52:45,881 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 71 transitions. [2021-05-02 20:52:45,881 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-05-02 20:52:45,881 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 71 transitions. [2021-05-02 20:52:45,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-02 20:52:45,882 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:52:45,882 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 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] [2021-05-02 20:52:46,100 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:52:46,101 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:52:46,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:52:46,101 INFO L82 PathProgramCache]: Analyzing trace with hash 5711864, now seen corresponding path program 1 times [2021-05-02 20:52:46,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:52:46,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833639283] [2021-05-02 20:52:46,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:52:46,109 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:52:46,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [455851837] [2021-05-02 20:52:46,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:52:46,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:46,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 20:52:46,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:52:46,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:46,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:46,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:46,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:46,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:46,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:46,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:46,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:46,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:46,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:46,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:46,435 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-05-02 20:52:46,435 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:52:46,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833639283] [2021-05-02 20:52:46,435 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:52:46,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455851837] [2021-05-02 20:52:46,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455851837] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:52:46,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:52:46,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-05-02 20:52:46,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628484723] [2021-05-02 20:52:46,436 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:52:46,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:52:46,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:52:46,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:52:46,437 INFO L87 Difference]: Start difference. First operand 59 states and 71 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 20:52:46,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:52:46,585 INFO L93 Difference]: Finished difference Result 67 states and 77 transitions. [2021-05-02 20:52:46,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:52:46,585 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 45 [2021-05-02 20:52:46,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:52:46,586 INFO L225 Difference]: With dead ends: 67 [2021-05-02 20:52:46,586 INFO L226 Difference]: Without dead ends: 58 [2021-05-02 20:52:46,587 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 90.7ms TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:52:46,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-02 20:52:46,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-05-02 20:52:46,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 35 states have internal predecessors, (38), 15 states have call successors, (15), 9 states have call predecessors, (15), 8 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 20:52:46,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2021-05-02 20:52:46,590 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 45 [2021-05-02 20:52:46,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:52:46,590 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2021-05-02 20:52:46,590 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 20:52:46,591 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2021-05-02 20:52:46,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-02 20:52:46,591 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:52:46,591 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:52:46,810 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:52:46,811 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:52:46,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:52:46,811 INFO L82 PathProgramCache]: Analyzing trace with hash 1597443315, now seen corresponding path program 1 times [2021-05-02 20:52:46,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:52:46,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059028157] [2021-05-02 20:52:46,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:52:46,818 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:52:46,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [138986173] [2021-05-02 20:52:46,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:52:46,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:46,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-02 20:52:46,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:52:46,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:46,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:46,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:46,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:46,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:46,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:46,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:46,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:47,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:47,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:47,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:47,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:47,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:47,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:47,086 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 24 proven. 8 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-05-02 20:52:47,086 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:52:47,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059028157] [2021-05-02 20:52:47,086 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:52:47,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138986173] [2021-05-02 20:52:47,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138986173] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:52:47,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:52:47,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 20:52:47,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271527336] [2021-05-02 20:52:47,087 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 20:52:47,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:52:47,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 20:52:47,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:52:47,087 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2021-05-02 20:52:47,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:52:47,300 INFO L93 Difference]: Finished difference Result 82 states and 98 transitions. [2021-05-02 20:52:47,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 20:52:47,301 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) Word has length 55 [2021-05-02 20:52:47,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:52:47,302 INFO L225 Difference]: With dead ends: 82 [2021-05-02 20:52:47,302 INFO L226 Difference]: Without dead ends: 81 [2021-05-02 20:52:47,302 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 89.6ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-05-02 20:52:47,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-05-02 20:52:47,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-05-02 20:52:47,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 47 states have (on average 1.127659574468085) internal successors, (53), 49 states have internal predecessors, (53), 23 states have call successors, (23), 11 states have call predecessors, (23), 10 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-02 20:52:47,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 96 transitions. [2021-05-02 20:52:47,307 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 96 transitions. Word has length 55 [2021-05-02 20:52:47,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:52:47,307 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 96 transitions. [2021-05-02 20:52:47,308 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2021-05-02 20:52:47,308 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 96 transitions. [2021-05-02 20:52:47,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-05-02 20:52:47,308 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:52:47,308 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 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] [2021-05-02 20:52:47,509 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:52:47,509 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:52:47,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:52:47,510 INFO L82 PathProgramCache]: Analyzing trace with hash 1292294975, now seen corresponding path program 1 times [2021-05-02 20:52:47,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:52:47,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513616568] [2021-05-02 20:52:47,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:52:47,516 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:52:47,516 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [213329609] [2021-05-02 20:52:47,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:52:47,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:47,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-02 20:52:47,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:52:47,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:47,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:47,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:47,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:47,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:47,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:47,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:47,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:47,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:47,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:47,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:47,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:47,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:47,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:47,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:47,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:47,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:47,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:47,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:47,926 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 18 proven. 5 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-05-02 20:52:47,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:52:47,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513616568] [2021-05-02 20:52:47,926 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:52:47,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213329609] [2021-05-02 20:52:47,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213329609] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:52:47,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:52:47,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 20:52:47,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467813396] [2021-05-02 20:52:47,927 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:52:47,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:52:47,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:52:47,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:52:47,927 INFO L87 Difference]: Start difference. First operand 81 states and 96 transitions. Second operand has 11 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-02 20:52:48,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:52:48,153 INFO L93 Difference]: Finished difference Result 84 states and 94 transitions. [2021-05-02 20:52:48,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 20:52:48,153 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 62 [2021-05-02 20:52:48,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:52:48,154 INFO L225 Difference]: With dead ends: 84 [2021-05-02 20:52:48,154 INFO L226 Difference]: Without dead ends: 84 [2021-05-02 20:52:48,155 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 177.0ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:52:48,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-05-02 20:52:48,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2021-05-02 20:52:48,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 51 states have (on average 1.0980392156862746) internal successors, (56), 52 states have internal predecessors, (56), 20 states have call successors, (20), 13 states have call predecessors, (20), 12 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-02 20:52:48,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 94 transitions. [2021-05-02 20:52:48,159 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 94 transitions. Word has length 62 [2021-05-02 20:52:48,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:52:48,159 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 94 transitions. [2021-05-02 20:52:48,159 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-02 20:52:48,159 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 94 transitions. [2021-05-02 20:52:48,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-05-02 20:52:48,160 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:52:48,160 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:52:48,386 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:52:48,386 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:52:48,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:52:48,387 INFO L82 PathProgramCache]: Analyzing trace with hash 294687610, now seen corresponding path program 2 times [2021-05-02 20:52:48,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:52:48,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236562847] [2021-05-02 20:52:48,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:52:48,395 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:52:48,395 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1978603495] [2021-05-02 20:52:48,395 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:52:48,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:52:48,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:52:48,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-02 20:52:48,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:52:48,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:48,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:48,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:48,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:48,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:48,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:48,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:48,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:48,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:48,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:48,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:48,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:48,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:48,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:48,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:48,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:48,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:48,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:48,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:48,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:48,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:48,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:48,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:48,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:48,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:48,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:48,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:48,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:48,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:48,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:48,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:48,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:48,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:48,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:48,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:48,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:48,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:48,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:48,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:48,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:48,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:48,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:48,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:48,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:48,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:48,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:48,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:48,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:48,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:48,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:48,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:48,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:48,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:48,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:48,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:48,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:48,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:48,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:48,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:48,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:48,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:48,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:48,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:48,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:48,660 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 76 proven. 3 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-05-02 20:52:48,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:52:48,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236562847] [2021-05-02 20:52:48,660 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:52:48,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978603495] [2021-05-02 20:52:48,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978603495] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:52:48,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:52:48,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 20:52:48,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127955898] [2021-05-02 20:52:48,661 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 20:52:48,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:52:48,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 20:52:48,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:52:48,661 INFO L87 Difference]: Start difference. First operand 84 states and 94 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 20:52:48,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:52:48,749 INFO L93 Difference]: Finished difference Result 77 states and 88 transitions. [2021-05-02 20:52:48,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:52:48,749 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) Word has length 72 [2021-05-02 20:52:48,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:52:48,750 INFO L225 Difference]: With dead ends: 77 [2021-05-02 20:52:48,750 INFO L226 Difference]: Without dead ends: 77 [2021-05-02 20:52:48,751 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 58.1ms TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:52:48,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-05-02 20:52:48,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 71. [2021-05-02 20:52:48,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 43 states have (on average 1.069767441860465) internal successors, (46), 44 states have internal predecessors, (46), 17 states have call successors, (17), 11 states have call predecessors, (17), 10 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 20:52:48,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 78 transitions. [2021-05-02 20:52:48,758 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 78 transitions. Word has length 72 [2021-05-02 20:52:48,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:52:48,759 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 78 transitions. [2021-05-02 20:52:48,759 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 20:52:48,759 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 78 transitions. [2021-05-02 20:52:48,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-02 20:52:48,760 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:52:48,760 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 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] [2021-05-02 20:52:48,976 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:52:48,977 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:52:48,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:52:48,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1689231171, now seen corresponding path program 1 times [2021-05-02 20:52:48,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:52:48,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348206461] [2021-05-02 20:52:48,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:52:48,991 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:52:48,991 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1493511792] [2021-05-02 20:52:48,991 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 [2021-05-02 20:52:49,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:49,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-02 20:52:49,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:52:49,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:49,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:49,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:49,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:49,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:49,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:49,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:49,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:49,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:49,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:49,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:49,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:49,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:49,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:49,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:49,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:49,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:49,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:49,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:49,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:49,583 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 44 proven. 21 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-05-02 20:52:49,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:52:49,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348206461] [2021-05-02 20:52:49,585 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:52:49,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493511792] [2021-05-02 20:52:49,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493511792] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:52:49,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:52:49,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-02 20:52:49,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308256880] [2021-05-02 20:52:49,586 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 20:52:49,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:52:49,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 20:52:49,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-05-02 20:52:49,587 INFO L87 Difference]: Start difference. First operand 71 states and 78 transitions. Second operand has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 12 states have internal predecessors, (28), 6 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 7 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 20:52:49,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:52:49,785 INFO L93 Difference]: Finished difference Result 82 states and 93 transitions. [2021-05-02 20:52:49,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 20:52:49,786 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 12 states have internal predecessors, (28), 6 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 7 states have call predecessors, (12), 5 states have call successors, (12) Word has length 75 [2021-05-02 20:52:49,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:52:49,786 INFO L225 Difference]: With dead ends: 82 [2021-05-02 20:52:49,786 INFO L226 Difference]: Without dead ends: 82 [2021-05-02 20:52:49,787 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 212.4ms TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-05-02 20:52:49,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-05-02 20:52:49,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 80. [2021-05-02 20:52:49,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 50 states have internal predecessors, (54), 19 states have call successors, (19), 12 states have call predecessors, (19), 11 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 20:52:49,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 90 transitions. [2021-05-02 20:52:49,801 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 90 transitions. Word has length 75 [2021-05-02 20:52:49,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:52:49,801 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 90 transitions. [2021-05-02 20:52:49,801 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 12 states have internal predecessors, (28), 6 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 7 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 20:52:49,801 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 90 transitions. [2021-05-02 20:52:49,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-02 20:52:49,804 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:52:49,804 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 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] [2021-05-02 20:52:50,019 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:52:50,020 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:52:50,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:52:50,020 INFO L82 PathProgramCache]: Analyzing trace with hash 915008698, now seen corresponding path program 2 times [2021-05-02 20:52:50,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:52:50,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188852240] [2021-05-02 20:52:50,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:52:50,029 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:52:50,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1312446034] [2021-05-02 20:52:50,030 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:52:50,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:52:50,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:52:50,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-02 20:52:50,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:52:50,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:50,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:50,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:50,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:50,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:50,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:50,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:50,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:50,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:50,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:50,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:50,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:50,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:50,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:50,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:50,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:50,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:50,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:50,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:50,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:50,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:50,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:50,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:50,593 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 49 proven. 25 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-05-02 20:52:50,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:52:50,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188852240] [2021-05-02 20:52:50,593 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:52:50,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312446034] [2021-05-02 20:52:50,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312446034] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:52:50,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:52:50,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-02 20:52:50,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576605010] [2021-05-02 20:52:50,594 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 20:52:50,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:52:50,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 20:52:50,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-05-02 20:52:50,596 INFO L87 Difference]: Start difference. First operand 80 states and 90 transitions. Second operand has 17 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 12 states have internal predecessors, (28), 7 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 8 states have call predecessors, (13), 6 states have call successors, (13) [2021-05-02 20:52:50,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:52:50,764 INFO L93 Difference]: Finished difference Result 72 states and 76 transitions. [2021-05-02 20:52:50,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 20:52:50,764 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 12 states have internal predecessors, (28), 7 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 8 states have call predecessors, (13), 6 states have call successors, (13) Word has length 80 [2021-05-02 20:52:50,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:52:50,765 INFO L225 Difference]: With dead ends: 72 [2021-05-02 20:52:50,765 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 20:52:50,765 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 240.9ms TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-05-02 20:52:50,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 20:52:50,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 20:52:50,765 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) [2021-05-02 20:52:50,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 20:52:50,765 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 80 [2021-05-02 20:52:50,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:52:50,766 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 20:52:50,766 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 12 states have internal predecessors, (28), 7 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 8 states have call predecessors, (13), 6 states have call successors, (13) [2021-05-02 20:52:50,766 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 20:52:50,766 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 20:52:50,980 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-02 20:52:50,984 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:52:50 BasicIcfg [2021-05-02 20:52:50,984 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 20:52:50,984 INFO L168 Benchmark]: Toolchain (without parser) took 7437.66 ms. Allocated memory was 209.7 MB in the beginning and 310.4 MB in the end (delta: 100.7 MB). Free memory was 174.7 MB in the beginning and 245.5 MB in the end (delta: -70.8 MB). Peak memory consumption was 30.9 MB. Max. memory is 8.0 GB. [2021-05-02 20:52:50,984 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 209.7 MB. Free memory was 191.3 MB in the beginning and 191.2 MB in the end (delta: 107.0 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 20:52:50,984 INFO L168 Benchmark]: CACSL2BoogieTranslator took 227.04 ms. Allocated memory is still 209.7 MB. Free memory was 174.5 MB in the beginning and 192.6 MB in the end (delta: -18.2 MB). Peak memory consumption was 12.8 MB. Max. memory is 8.0 GB. [2021-05-02 20:52:50,984 INFO L168 Benchmark]: Boogie Preprocessor took 39.38 ms. Allocated memory is still 209.7 MB. Free memory was 192.6 MB in the beginning and 191.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-02 20:52:50,984 INFO L168 Benchmark]: RCFGBuilder took 275.91 ms. Allocated memory is still 209.7 MB. Free memory was 191.1 MB in the beginning and 174.8 MB in the end (delta: 16.3 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-02 20:52:50,985 INFO L168 Benchmark]: IcfgTransformer took 33.70 ms. Allocated memory is still 209.7 MB. Free memory was 174.8 MB in the beginning and 173.8 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 20:52:50,985 INFO L168 Benchmark]: TraceAbstraction took 6853.39 ms. Allocated memory was 209.7 MB in the beginning and 310.4 MB in the end (delta: 100.7 MB). Free memory was 173.2 MB in the beginning and 245.5 MB in the end (delta: -72.3 MB). Peak memory consumption was 28.6 MB. Max. memory is 8.0 GB. [2021-05-02 20:52:50,985 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 209.7 MB. Free memory was 191.3 MB in the beginning and 191.2 MB in the end (delta: 107.0 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 227.04 ms. Allocated memory is still 209.7 MB. Free memory was 174.5 MB in the beginning and 192.6 MB in the end (delta: -18.2 MB). Peak memory consumption was 12.8 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 39.38 ms. Allocated memory is still 209.7 MB. Free memory was 192.6 MB in the beginning and 191.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 275.91 ms. Allocated memory is still 209.7 MB. Free memory was 191.1 MB in the beginning and 174.8 MB in the end (delta: 16.3 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * IcfgTransformer took 33.70 ms. Allocated memory is still 209.7 MB. Free memory was 174.8 MB in the beginning and 173.8 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 6853.39 ms. Allocated memory was 209.7 MB in the beginning and 310.4 MB in the end (delta: 100.7 MB). Free memory was 173.2 MB in the beginning and 245.5 MB in the end (delta: -72.3 MB). Peak memory consumption was 28.6 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, 38 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 6815.7ms, OverallIterations: 10, TraceHistogramMax: 10, EmptinessCheckTime: 19.2ms, AutomataDifference: 1819.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 5.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 338 SDtfs, 342 SDslu, 1299 SDs, 0 SdLazy, 1618 SolverSat, 329 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1036.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 490 GetRequests, 378 SyntacticMatches, 1 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 1247.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=84occurred in iteration=7, InterpolantAutomatonStates: 98, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 79.8ms AutomataMinimizationTime, 10 MinimizatonAttempts, 22 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 58.7ms SsaConstructionTime, 193.8ms SatisfiabilityAnalysisTime, 2770.4ms InterpolantComputationTime, 516 NumberOfCodeBlocks, 516 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 506 ConstructedInterpolants, 0 QuantifiedInterpolants, 2991 SizeOfPredicates, 38 NumberOfNonLiveVariables, 1275 ConjunctsInSsa, 216 ConjunctsInUnsatCore, 10 InterpolantComputations, 4 PerfectInterpolantSequences, 659/725 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...