/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_valuebound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 20:52:52,715 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 20:52:52,717 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 20:52:52,742 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 20:52:52,742 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 20:52:52,745 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 20:52:52,747 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 20:52:52,750 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 20:52:52,752 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 20:52:52,755 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 20:52:52,755 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 20:52:52,756 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 20:52:52,756 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 20:52:52,757 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 20:52:52,757 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 20:52:52,758 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 20:52:52,758 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 20:52:52,759 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 20:52:52,760 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 20:52:52,761 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 20:52:52,762 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 20:52:52,762 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 20:52:52,763 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 20:52:52,763 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 20:52:52,765 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 20:52:52,770 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 20:52:52,770 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 20:52:52,771 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 20:52:52,773 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 20:52:52,784 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 20:52:52,784 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 20:52:52,785 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 20:52:52,785 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 20:52:52,785 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 20:52:52,786 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 20:52:52,786 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 20:52:52,786 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 20:52:52,786 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 20:52:52,786 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 20:52:52,786 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 20:52:52,786 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 20:52:52,786 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 20:52:52,787 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 20:52:52,787 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 20:52:52,787 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 20:52:52,787 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 20:52:52,787 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 20:52:52,787 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:52:52,787 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 20:52:52,787 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 20:52:52,788 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 20:52:52,788 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 20:52:53,024 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 20:52:53,051 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 20:52:53,053 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 20:52:53,054 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 20:52:53,054 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 20:52:53,054 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound10.c [2021-05-02 20:52:53,106 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/46520d762/44d86065b7c64b1a8395ca7d62c4d85b/FLAG7cb5ef4b2 [2021-05-02 20:52:53,473 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 20:52:53,474 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound10.c [2021-05-02 20:52:53,478 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/46520d762/44d86065b7c64b1a8395ca7d62c4d85b/FLAG7cb5ef4b2 [2021-05-02 20:52:53,493 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/46520d762/44d86065b7c64b1a8395ca7d62c4d85b [2021-05-02 20:52:53,495 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 20:52:53,496 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 20:52:53,500 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 20:52:53,500 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 20:52:53,503 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 20:52:53,504 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:52:53" (1/1) ... [2021-05-02 20:52:53,504 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@697e3bdd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:52:53, skipping insertion in model container [2021-05-02 20:52:53,504 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:52:53" (1/1) ... [2021-05-02 20:52:53,508 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 20:52:53,519 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 20:52:53,635 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_valuebound10.c[546,559] [2021-05-02 20:52:53,652 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:52:53,660 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 20:52:53,682 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_valuebound10.c[546,559] [2021-05-02 20:52:53,709 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:52:53,720 INFO L208 MainTranslator]: Completed translation [2021-05-02 20:52:53,721 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:52:53 WrapperNode [2021-05-02 20:52:53,721 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 20:52:53,722 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 20:52:53,724 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 20:52:53,724 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 20:52:53,731 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:52:53" (1/1) ... [2021-05-02 20:52:53,732 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:52:53" (1/1) ... [2021-05-02 20:52:53,743 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:52:53" (1/1) ... [2021-05-02 20:52:53,744 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:52:53" (1/1) ... [2021-05-02 20:52:53,754 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:52:53" (1/1) ... [2021-05-02 20:52:53,758 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:52:53" (1/1) ... [2021-05-02 20:52:53,764 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:52:53" (1/1) ... [2021-05-02 20:52:53,765 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 20:52:53,766 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 20:52:53,766 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 20:52:53,766 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 20:52:53,766 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:52:53" (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 20:52:53,828 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 20:52:53,829 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 20:52:53,829 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 20:52:53,829 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 20:52:53,829 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 20:52:53,829 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 20:52:53,829 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 20:52:53,829 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 20:52:53,829 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 20:52:53,830 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 20:52:53,830 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-02 20:52:53,830 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 20:52:53,830 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 20:52:53,830 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 20:52:53,831 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 20:52:53,831 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 20:52:53,831 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 20:52:53,831 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 20:52:53,831 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 20:52:53,832 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 20:52:54,009 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 20:52:54,009 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 20:52:54,010 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:52:54 BoogieIcfgContainer [2021-05-02 20:52:54,010 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 20:52:54,011 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 20:52:54,011 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 20:52:54,012 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 20:52:54,013 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:52:54" (1/1) ... [2021-05-02 20:52:54,025 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:52:54 BasicIcfg [2021-05-02 20:52:54,025 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 20:52:54,026 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 20:52:54,026 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 20:52:54,028 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 20:52:54,028 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 08:52:53" (1/4) ... [2021-05-02 20:52:54,029 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38995f37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:52:54, skipping insertion in model container [2021-05-02 20:52:54,029 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:52:53" (2/4) ... [2021-05-02 20:52:54,029 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38995f37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:52:54, skipping insertion in model container [2021-05-02 20:52:54,029 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:52:54" (3/4) ... [2021-05-02 20:52:54,029 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38995f37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:52:54, skipping insertion in model container [2021-05-02 20:52:54,029 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:52:54" (4/4) ... [2021-05-02 20:52:54,030 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-ll_valuebound10.cJordan [2021-05-02 20:52:54,033 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 20:52:54,036 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 20:52:54,061 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 20:52:54,074 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 20:52:54,074 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 20:52:54,074 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 20:52:54,074 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 20:52:54,074 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 20:52:54,074 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 20:52:54,074 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 20:52:54,074 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 20:52:54,085 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 20:52:54,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 20:52:54,093 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:52:54,093 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 20:52:54,094 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:52:54,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:52:54,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1011787902, now seen corresponding path program 1 times [2021-05-02 20:52:54,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:52:54,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333810492] [2021-05-02 20:52:54,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:52:54,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:54,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 20:52:54,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:54,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 20:52:54,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:54,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 20:52:54,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:54,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 20:52:54,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:54,275 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 20:52:54,275 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:52:54,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333810492] [2021-05-02 20:52:54,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333810492] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:52:54,276 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:52:54,276 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 20:52:54,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551965557] [2021-05-02 20:52:54,279 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 20:52:54,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:52:54,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 20:52:54,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:52:54,289 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 20:52:54,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:52:54,375 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2021-05-02 20:52:54,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 20:52:54,376 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 20:52:54,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:52:54,380 INFO L225 Difference]: With dead ends: 38 [2021-05-02 20:52:54,381 INFO L226 Difference]: Without dead ends: 33 [2021-05-02 20:52:54,381 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:52:54,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-02 20:52:54,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-02 20:52:54,401 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 20:52:54,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2021-05-02 20:52:54,403 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 28 [2021-05-02 20:52:54,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:52:54,403 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2021-05-02 20:52:54,403 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 20:52:54,403 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2021-05-02 20:52:54,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 20:52:54,404 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:52:54,404 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:52:54,405 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 20:52:54,405 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:52:54,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:52:54,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1710049411, now seen corresponding path program 1 times [2021-05-02 20:52:54,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:52:54,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429148363] [2021-05-02 20:52:54,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:52:54,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:54,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 20:52:54,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:54,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 20:52:54,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:54,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 20:52:54,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:54,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 20:52:54,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:54,554 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 20:52:54,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:52:54,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429148363] [2021-05-02 20:52:54,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429148363] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:52:54,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:52:54,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 20:52:54,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554602075] [2021-05-02 20:52:54,555 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 20:52:54,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:52:54,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 20:52:54,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:52:54,556 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 20:52:54,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:52:54,799 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2021-05-02 20:52:54,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 20:52:54,801 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 20:52:54,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:52:54,801 INFO L225 Difference]: With dead ends: 44 [2021-05-02 20:52:54,802 INFO L226 Difference]: Without dead ends: 44 [2021-05-02 20:52:54,802 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 132.0ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:52:54,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-02 20:52:54,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2021-05-02 20:52:54,807 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 20:52:54,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2021-05-02 20:52:54,808 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 28 [2021-05-02 20:52:54,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:52:54,808 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2021-05-02 20:52:54,808 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 20:52:54,808 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2021-05-02 20:52:54,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 20:52:54,809 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:52:54,809 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 20:52:54,809 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 20:52:54,809 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:52:54,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:52:54,810 INFO L82 PathProgramCache]: Analyzing trace with hash 1042498848, now seen corresponding path program 1 times [2021-05-02 20:52:54,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:52:54,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198176145] [2021-05-02 20:52:54,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:52:54,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:54,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 20:52:54,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:54,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 20:52:54,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:54,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 20:52:54,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:54,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 20:52:54,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:54,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-05-02 20:52:54,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:54,933 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 20:52:54,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:52:54,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198176145] [2021-05-02 20:52:54,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198176145] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:52:54,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:52:54,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 20:52:54,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228009108] [2021-05-02 20:52:54,935 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 20:52:54,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:52:54,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 20:52:54,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:52:54,935 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 20:52:55,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:52:55,160 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2021-05-02 20:52:55,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 20:52:55,161 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 20:52:55,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:52:55,162 INFO L225 Difference]: With dead ends: 48 [2021-05-02 20:52:55,162 INFO L226 Difference]: Without dead ends: 48 [2021-05-02 20:52:55,162 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 108.9ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:52:55,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-02 20:52:55,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2021-05-02 20:52:55,165 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 20:52:55,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2021-05-02 20:52:55,166 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 33 [2021-05-02 20:52:55,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:52:55,166 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2021-05-02 20:52:55,166 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 20:52:55,166 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2021-05-02 20:52:55,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 20:52:55,167 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:52:55,167 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 20:52:55,167 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-02 20:52:55,167 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:52:55,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:52:55,168 INFO L82 PathProgramCache]: Analyzing trace with hash 1436069466, now seen corresponding path program 1 times [2021-05-02 20:52:55,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:52:55,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106908981] [2021-05-02 20:52:55,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:52:55,176 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:52:55,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [849149781] [2021-05-02 20:52:55,176 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 20:52:55,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:55,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 20:52:55,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:52:55,412 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-05-02 20:52:55,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:52:55,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106908981] [2021-05-02 20:52:55,413 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:52:55,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849149781] [2021-05-02 20:52:55,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849149781] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:52:55,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:52:55,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 20:52:55,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656903341] [2021-05-02 20:52:55,414 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 20:52:55,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:52:55,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 20:52:55,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:52:55,415 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 20:52:55,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:52:55,519 INFO L93 Difference]: Finished difference Result 60 states and 73 transitions. [2021-05-02 20:52:55,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 20:52:55,520 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 38 [2021-05-02 20:52:55,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:52:55,520 INFO L225 Difference]: With dead ends: 60 [2021-05-02 20:52:55,520 INFO L226 Difference]: Without dead ends: 59 [2021-05-02 20:52:55,521 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 46.4ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:52:55,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-05-02 20:52:55,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-05-02 20:52:55,525 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 20:52:55,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 71 transitions. [2021-05-02 20:52:55,525 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 71 transitions. Word has length 38 [2021-05-02 20:52:55,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:52:55,526 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 71 transitions. [2021-05-02 20:52:55,526 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 20:52:55,526 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 71 transitions. [2021-05-02 20:52:55,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-02 20:52:55,527 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:52:55,527 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 20:52:55,741 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:52:55,741 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:52:55,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:52:55,741 INFO L82 PathProgramCache]: Analyzing trace with hash 5711864, now seen corresponding path program 1 times [2021-05-02 20:52:55,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:52:55,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338479324] [2021-05-02 20:52:55,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:52:55,749 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:52:55,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [5241242] [2021-05-02 20:52:55,749 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 20:52:55,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:55,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 20:52:55,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:52:55,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:55,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:55,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:55,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:55,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:55,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:55,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:55,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:55,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:56,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:56,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:56,048 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 20:52:56,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:52:56,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338479324] [2021-05-02 20:52:56,049 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:52:56,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5241242] [2021-05-02 20:52:56,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5241242] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:52:56,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:52:56,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-05-02 20:52:56,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137664318] [2021-05-02 20:52:56,049 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:52:56,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:52:56,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:52:56,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:52:56,050 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 20:52:56,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:52:56,225 INFO L93 Difference]: Finished difference Result 67 states and 77 transitions. [2021-05-02 20:52:56,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:52:56,225 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 20:52:56,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:52:56,229 INFO L225 Difference]: With dead ends: 67 [2021-05-02 20:52:56,229 INFO L226 Difference]: Without dead ends: 58 [2021-05-02 20:52:56,229 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 86.3ms TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:52:56,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-02 20:52:56,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-05-02 20:52:56,239 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 20:52:56,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2021-05-02 20:52:56,241 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 45 [2021-05-02 20:52:56,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:52:56,242 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2021-05-02 20:52:56,243 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 20:52:56,243 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2021-05-02 20:52:56,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-02 20:52:56,246 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:52:56,247 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 20:52:56,469 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:52:56,469 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:52:56,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:52:56,470 INFO L82 PathProgramCache]: Analyzing trace with hash 1597443315, now seen corresponding path program 1 times [2021-05-02 20:52:56,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:52:56,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378336547] [2021-05-02 20:52:56,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:52:56,476 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:52:56,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [73795161] [2021-05-02 20:52:56,477 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 20:52:56,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:56,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-02 20:52:56,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:52:56,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:56,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:56,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:56,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:56,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:56,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:56,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:56,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:56,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:56,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:56,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:56,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:56,673 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 20:52:56,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:52:56,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378336547] [2021-05-02 20:52:56,673 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:52:56,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73795161] [2021-05-02 20:52:56,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73795161] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:52:56,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:52:56,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 20:52:56,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270264059] [2021-05-02 20:52:56,674 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 20:52:56,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:52:56,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 20:52:56,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:52:56,675 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 20:52:56,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:52:56,893 INFO L93 Difference]: Finished difference Result 82 states and 98 transitions. [2021-05-02 20:52:56,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:52:56,893 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 55 [2021-05-02 20:52:56,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:52:56,896 INFO L225 Difference]: With dead ends: 82 [2021-05-02 20:52:56,896 INFO L226 Difference]: Without dead ends: 81 [2021-05-02 20:52:56,900 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 78.8ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:52:56,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-05-02 20:52:56,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-05-02 20:52:56,910 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 20:52:56,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 96 transitions. [2021-05-02 20:52:56,910 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 96 transitions. Word has length 55 [2021-05-02 20:52:56,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:52:56,910 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 96 transitions. [2021-05-02 20:52:56,911 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 20:52:56,911 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 96 transitions. [2021-05-02 20:52:56,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-05-02 20:52:56,911 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:52:56,911 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 20:52:57,120 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:52:57,121 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:52:57,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:52:57,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1292294975, now seen corresponding path program 1 times [2021-05-02 20:52:57,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:52:57,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709653809] [2021-05-02 20:52:57,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:52:57,129 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:52:57,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1265735005] [2021-05-02 20:52:57,129 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 20:52:57,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:57,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-02 20:52:57,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:52:57,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:57,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:57,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:57,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:57,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:57,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:57,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:57,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:57,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:57,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:57,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:57,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:57,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:57,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:57,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:57,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:57,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:57,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:57,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:57,608 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 20:52:57,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:52:57,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709653809] [2021-05-02 20:52:57,609 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:52:57,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265735005] [2021-05-02 20:52:57,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265735005] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:52:57,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:52:57,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 20:52:57,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714199522] [2021-05-02 20:52:57,612 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:52:57,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:52:57,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:52:57,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:52:57,613 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 20:52:57,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:52:57,852 INFO L93 Difference]: Finished difference Result 89 states and 102 transitions. [2021-05-02 20:52:57,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 20:52:57,852 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 20:52:57,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:52:57,853 INFO L225 Difference]: With dead ends: 89 [2021-05-02 20:52:57,853 INFO L226 Difference]: Without dead ends: 84 [2021-05-02 20:52:57,853 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 178.2ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:52:57,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-05-02 20:52:57,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2021-05-02 20:52:57,857 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 20:52:57,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 94 transitions. [2021-05-02 20:52:57,858 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 94 transitions. Word has length 62 [2021-05-02 20:52:57,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:52:57,859 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 94 transitions. [2021-05-02 20:52:57,859 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 20:52:57,859 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 94 transitions. [2021-05-02 20:52:57,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-05-02 20:52:57,860 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:52:57,860 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 20:52:58,068 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:52:58,069 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:52:58,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:52:58,069 INFO L82 PathProgramCache]: Analyzing trace with hash 294687610, now seen corresponding path program 2 times [2021-05-02 20:52:58,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:52:58,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844860283] [2021-05-02 20:52:58,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:52:58,075 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:52:58,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [391408209] [2021-05-02 20:52:58,075 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 20:52:58,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:52:58,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:52:58,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-02 20:52:58,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:52:58,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,760 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 50 proven. 21 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-05-02 20:52:58,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:52:58,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844860283] [2021-05-02 20:52:58,761 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:52:58,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391408209] [2021-05-02 20:52:58,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391408209] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:52:58,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:52:58,761 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 20:52:58,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276672127] [2021-05-02 20:52:58,761 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 20:52:58,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:52:58,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 20:52:58,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-05-02 20:52:58,762 INFO L87 Difference]: Start difference. First operand 84 states and 94 transitions. Second operand has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 10 states have internal predecessors, (25), 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 20:52:59,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:52:59,095 INFO L93 Difference]: Finished difference Result 117 states and 138 transitions. [2021-05-02 20:52:59,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 20:52:59,096 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 10 states have internal predecessors, (25), 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 20:52:59,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:52:59,096 INFO L225 Difference]: With dead ends: 117 [2021-05-02 20:52:59,097 INFO L226 Difference]: Without dead ends: 116 [2021-05-02 20:52:59,097 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 147.6ms TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-05-02 20:52:59,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-05-02 20:52:59,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2021-05-02 20:52:59,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 70 states have (on average 1.1285714285714286) internal successors, (79), 72 states have internal predecessors, (79), 30 states have call successors, (30), 16 states have call predecessors, (30), 15 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-05-02 20:52:59,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 136 transitions. [2021-05-02 20:52:59,101 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 136 transitions. Word has length 72 [2021-05-02 20:52:59,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:52:59,101 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 136 transitions. [2021-05-02 20:52:59,102 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 10 states have internal predecessors, (25), 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 20:52:59,102 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 136 transitions. [2021-05-02 20:52:59,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-02 20:52:59,102 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:52:59,102 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 20:52:59,309 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-05-02 20:52:59,309 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:52:59,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:52:59,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1689231171, now seen corresponding path program 1 times [2021-05-02 20:52:59,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:52:59,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414600061] [2021-05-02 20:52:59,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:52:59,316 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:52:59,316 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [689129264] [2021-05-02 20:52:59,316 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 20:52:59,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:59,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-02 20:52:59,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:52:59,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:59,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:59,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:59,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:59,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:59,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:59,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:59,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:59,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:59,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:59,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:59,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:59,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:59,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:59,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:59,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:59,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:59,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:59,651 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-05-02 20:52:59,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:52:59,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414600061] [2021-05-02 20:52:59,652 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:52:59,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689129264] [2021-05-02 20:52:59,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689129264] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:52:59,652 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:52:59,652 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 20:52:59,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489416121] [2021-05-02 20:52:59,652 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 20:52:59,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:52:59,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 20:52:59,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:52:59,653 INFO L87 Difference]: Start difference. First operand 116 states and 136 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-02 20:52:59,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:52:59,820 INFO L93 Difference]: Finished difference Result 127 states and 151 transitions. [2021-05-02 20:52:59,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 20:52:59,820 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) Word has length 75 [2021-05-02 20:52:59,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:52:59,821 INFO L225 Difference]: With dead ends: 127 [2021-05-02 20:52:59,821 INFO L226 Difference]: Without dead ends: 127 [2021-05-02 20:52:59,822 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 117.5ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-05-02 20:52:59,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-05-02 20:52:59,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 125. [2021-05-02 20:52:59,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 76 states have (on average 1.144736842105263) internal successors, (87), 78 states have internal predecessors, (87), 32 states have call successors, (32), 17 states have call predecessors, (32), 16 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2021-05-02 20:52:59,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 148 transitions. [2021-05-02 20:52:59,827 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 148 transitions. Word has length 75 [2021-05-02 20:52:59,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:52:59,827 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 148 transitions. [2021-05-02 20:52:59,827 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-02 20:52:59,827 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 148 transitions. [2021-05-02 20:52:59,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-02 20:52:59,828 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:52:59,828 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:53:00,043 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:53:00,043 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:53:00,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:53:00,044 INFO L82 PathProgramCache]: Analyzing trace with hash -1714864424, now seen corresponding path program 2 times [2021-05-02 20:53:00,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:53:00,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746356247] [2021-05-02 20:53:00,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:53:00,057 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:53:00,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1791908280] [2021-05-02 20:53:00,057 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 20:53:00,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:53:00,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:53:00,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 20:53:00,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:53:00,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:00,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:00,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:00,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:00,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:00,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:00,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:00,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:00,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:00,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:00,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:00,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:00,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:00,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:00,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:00,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:00,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:00,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:00,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:00,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:00,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:00,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:00,314 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 41 proven. 7 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2021-05-02 20:53:00,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:53:00,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746356247] [2021-05-02 20:53:00,315 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:53:00,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791908280] [2021-05-02 20:53:00,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791908280] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:53:00,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:53:00,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 20:53:00,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033829982] [2021-05-02 20:53:00,316 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:53:00,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:53:00,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:53:00,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:53:00,317 INFO L87 Difference]: Start difference. First operand 125 states and 148 transitions. Second operand has 11 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-02 20:53:00,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:53:00,442 INFO L93 Difference]: Finished difference Result 136 states and 163 transitions. [2021-05-02 20:53:00,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:53:00,443 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 79 [2021-05-02 20:53:00,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:53:00,444 INFO L225 Difference]: With dead ends: 136 [2021-05-02 20:53:00,444 INFO L226 Difference]: Without dead ends: 135 [2021-05-02 20:53:00,445 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 63.8ms TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-05-02 20:53:00,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-05-02 20:53:00,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 134. [2021-05-02 20:53:00,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 82 states have (on average 1.146341463414634) internal successors, (94), 84 states have internal predecessors, (94), 34 states have call successors, (34), 18 states have call predecessors, (34), 17 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) [2021-05-02 20:53:00,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 160 transitions. [2021-05-02 20:53:00,455 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 160 transitions. Word has length 79 [2021-05-02 20:53:00,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:53:00,455 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 160 transitions. [2021-05-02 20:53:00,455 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-02 20:53:00,455 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 160 transitions. [2021-05-02 20:53:00,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-02 20:53:00,459 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:53:00,459 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 20:53:00,677 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-02 20:53:00,677 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:53:00,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:53:00,677 INFO L82 PathProgramCache]: Analyzing trace with hash 915008698, now seen corresponding path program 2 times [2021-05-02 20:53:00,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:53:00,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168806640] [2021-05-02 20:53:00,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:53:00,695 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:53:00,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1367485896] [2021-05-02 20:53:00,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:53:00,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:53:00,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:53:00,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 20:53:00,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:53:00,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:00,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:00,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:00,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:00,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:00,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:00,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:00,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:00,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:00,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:00,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:00,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:00,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:00,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:00,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:00,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:00,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:00,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:00,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:00,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:00,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:00,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:00,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:00,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:00,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:00,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:00,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:00,955 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 24 proven. 8 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2021-05-02 20:53:00,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:53:00,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168806640] [2021-05-02 20:53:00,956 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:53:00,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367485896] [2021-05-02 20:53:00,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367485896] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:53:00,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:53:00,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 20:53:00,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670744763] [2021-05-02 20:53:00,957 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:53:00,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:53:00,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:53:00,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:53:00,958 INFO L87 Difference]: Start difference. First operand 134 states and 160 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-02 20:53:01,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:53:01,102 INFO L93 Difference]: Finished difference Result 139 states and 163 transitions. [2021-05-02 20:53:01,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:53:01,103 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) Word has length 80 [2021-05-02 20:53:01,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:53:01,104 INFO L225 Difference]: With dead ends: 139 [2021-05-02 20:53:01,104 INFO L226 Difference]: Without dead ends: 138 [2021-05-02 20:53:01,104 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 80.9ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:53:01,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-05-02 20:53:01,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2021-05-02 20:53:01,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 84 states have (on average 1.119047619047619) internal successors, (94), 87 states have internal predecessors, (94), 35 states have call successors, (35), 19 states have call predecessors, (35), 18 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) [2021-05-02 20:53:01,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 161 transitions. [2021-05-02 20:53:01,108 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 161 transitions. Word has length 80 [2021-05-02 20:53:01,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:53:01,109 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 161 transitions. [2021-05-02 20:53:01,109 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-02 20:53:01,109 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 161 transitions. [2021-05-02 20:53:01,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-05-02 20:53:01,109 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:53:01,109 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:53:01,329 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-02 20:53:01,329 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:53:01,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:53:01,329 INFO L82 PathProgramCache]: Analyzing trace with hash -102783885, now seen corresponding path program 1 times [2021-05-02 20:53:01,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:53:01,330 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750301971] [2021-05-02 20:53:01,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:53:01,335 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:53:01,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2044052766] [2021-05-02 20:53:01,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:53:01,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:53:01,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-02 20:53:01,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:53:01,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:01,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:01,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:01,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:01,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:01,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:01,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:01,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:01,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:01,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:01,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:01,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:01,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:01,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:01,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:01,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:01,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:01,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:01,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:01,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:01,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:01,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:01,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:01,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:01,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:01,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:01,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:01,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:01,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:01,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:01,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,116 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-05-02 20:53:02,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,842 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 72 proven. 11 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2021-05-02 20:53:02,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:53:02,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750301971] [2021-05-02 20:53:02,843 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:53:02,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044052766] [2021-05-02 20:53:02,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044052766] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:53:02,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:53:02,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-02 20:53:02,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423056440] [2021-05-02 20:53:02,843 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 20:53:02,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:53:02,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 20:53:02,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-05-02 20:53:02,844 INFO L87 Difference]: Start difference. First operand 138 states and 161 transitions. Second operand has 17 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 13 states have internal predecessors, (29), 7 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 7 states have call predecessors, (14), 6 states have call successors, (14) [2021-05-02 20:53:05,414 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2021-05-02 20:53:05,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:53:05,502 INFO L93 Difference]: Finished difference Result 142 states and 164 transitions. [2021-05-02 20:53:05,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 20:53:05,503 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 13 states have internal predecessors, (29), 7 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 7 states have call predecessors, (14), 6 states have call successors, (14) Word has length 86 [2021-05-02 20:53:05,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:53:05,504 INFO L225 Difference]: With dead ends: 142 [2021-05-02 20:53:05,504 INFO L226 Difference]: Without dead ends: 112 [2021-05-02 20:53:05,504 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 757.7ms TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-05-02 20:53:05,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-05-02 20:53:05,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2021-05-02 20:53:05,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 67 states have (on average 1.1343283582089552) internal successors, (76), 69 states have internal predecessors, (76), 30 states have call successors, (30), 15 states have call predecessors, (30), 14 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) [2021-05-02 20:53:05,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 134 transitions. [2021-05-02 20:53:05,507 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 134 transitions. Word has length 86 [2021-05-02 20:53:05,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:53:05,508 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 134 transitions. [2021-05-02 20:53:05,508 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 13 states have internal predecessors, (29), 7 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 7 states have call predecessors, (14), 6 states have call successors, (14) [2021-05-02 20:53:05,508 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 134 transitions. [2021-05-02 20:53:05,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-02 20:53:05,509 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:53:05,509 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:53:05,717 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-02 20:53:05,717 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:53:05,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:53:05,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1101138899, now seen corresponding path program 3 times [2021-05-02 20:53:05,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:53:05,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458454341] [2021-05-02 20:53:05,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:53:05,723 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:53:05,724 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1743030339] [2021-05-02 20:53:05,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:53:05,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 20:53:05,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:53:05,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-02 20:53:05,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:53:08,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:08,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:08,347 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 82 proven. 8 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2021-05-02 20:53:08,347 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:53:08,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458454341] [2021-05-02 20:53:08,347 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:53:08,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743030339] [2021-05-02 20:53:08,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743030339] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:53:08,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:53:08,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 20:53:08,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295173063] [2021-05-02 20:53:08,348 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:53:08,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:53:08,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:53:08,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=68, Unknown=1, NotChecked=0, Total=90 [2021-05-02 20:53:08,349 INFO L87 Difference]: Start difference. First operand 112 states and 134 transitions. Second operand has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) [2021-05-02 20:53:30,779 WARN L205 SmtUtils]: Spent 4.15 s on a formula simplification that was a NOOP. DAG size: 23 [2021-05-02 20:53:41,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:53:41,000 INFO L93 Difference]: Finished difference Result 124 states and 146 transitions. [2021-05-02 20:53:41,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:53:41,000 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) Word has length 89 [2021-05-02 20:53:41,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:53:41,001 INFO L225 Difference]: With dead ends: 124 [2021-05-02 20:53:41,001 INFO L226 Difference]: Without dead ends: 124 [2021-05-02 20:53:41,001 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 8691.2ms TimeCoverageRelationStatistics Valid=38, Invalid=116, Unknown=2, NotChecked=0, Total=156 [2021-05-02 20:53:41,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-05-02 20:53:41,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 123. [2021-05-02 20:53:41,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 74 states have (on average 1.1216216216216217) internal successors, (83), 77 states have internal predecessors, (83), 32 states have call successors, (32), 17 states have call predecessors, (32), 16 states have return successors, (30), 28 states have call predecessors, (30), 30 states have call successors, (30) [2021-05-02 20:53:41,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 145 transitions. [2021-05-02 20:53:41,005 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 145 transitions. Word has length 89 [2021-05-02 20:53:41,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:53:41,005 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 145 transitions. [2021-05-02 20:53:41,005 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) [2021-05-02 20:53:41,005 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 145 transitions. [2021-05-02 20:53:41,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-02 20:53:41,006 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:53:41,006 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-05-02 20:53:41,221 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:53:41,221 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:53:41,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:53:41,221 INFO L82 PathProgramCache]: Analyzing trace with hash 632527946, now seen corresponding path program 3 times [2021-05-02 20:53:41,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:53:41,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388746242] [2021-05-02 20:53:41,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:53:41,239 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:53:41,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1781172177] [2021-05-02 20:53:41,239 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:53:41,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 20:53:41,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:53:41,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 20:53:41,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:53:41,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:41,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:41,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:41,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:41,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:41,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:41,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:41,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:41,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:41,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:41,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:41,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:41,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:41,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:41,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:41,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:41,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:41,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:41,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:41,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:41,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:41,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:41,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:41,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:41,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:41,633 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 42 proven. 33 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-05-02 20:53:41,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:53:41,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388746242] [2021-05-02 20:53:41,634 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:53:41,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781172177] [2021-05-02 20:53:41,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781172177] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:53:41,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:53:41,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 20:53:41,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327223907] [2021-05-02 20:53:41,635 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 20:53:41,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:53:41,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 20:53:41,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:53:41,637 INFO L87 Difference]: Start difference. First operand 123 states and 145 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 11 states have internal predecessors, (30), 5 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2021-05-02 20:53:42,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:53:42,043 INFO L93 Difference]: Finished difference Result 143 states and 166 transitions. [2021-05-02 20:53:42,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 20:53:42,043 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 11 states have internal predecessors, (30), 5 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) Word has length 92 [2021-05-02 20:53:42,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:53:42,044 INFO L225 Difference]: With dead ends: 143 [2021-05-02 20:53:42,044 INFO L226 Difference]: Without dead ends: 139 [2021-05-02 20:53:42,045 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 182.0ms TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-05-02 20:53:42,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-05-02 20:53:42,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 137. [2021-05-02 20:53:42,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 85 states have (on average 1.1176470588235294) internal successors, (95), 87 states have internal predecessors, (95), 32 states have call successors, (32), 20 states have call predecessors, (32), 19 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2021-05-02 20:53:42,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 157 transitions. [2021-05-02 20:53:42,048 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 157 transitions. Word has length 92 [2021-05-02 20:53:42,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:53:42,048 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 157 transitions. [2021-05-02 20:53:42,048 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 11 states have internal predecessors, (30), 5 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2021-05-02 20:53:42,048 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 157 transitions. [2021-05-02 20:53:42,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-05-02 20:53:42,049 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:53:42,049 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 20:53:42,264 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-05-02 20:53:42,264 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:53:42,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:53:42,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1701706771, now seen corresponding path program 4 times [2021-05-02 20:53:42,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:53:42,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111014563] [2021-05-02 20:53:42,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:53:42,276 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:53:42,276 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1722899074] [2021-05-02 20:53:42,276 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:53:42,326 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 20:53:42,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:53:42,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-02 20:53:42,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:53:42,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:42,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:42,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:42,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:42,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:42,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:42,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:42,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:42,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:42,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:42,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:42,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:42,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:42,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:42,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:42,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:42,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:42,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:42,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:42,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:42,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:42,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:42,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:42,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:42,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:42,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:42,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:42,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:42,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:42,714 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 41 proven. 40 refuted. 0 times theorem prover too weak. 237 trivial. 0 not checked. [2021-05-02 20:53:42,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:53:42,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111014563] [2021-05-02 20:53:42,714 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:53:42,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722899074] [2021-05-02 20:53:42,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722899074] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:53:42,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:53:42,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-02 20:53:42,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597507144] [2021-05-02 20:53:42,715 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 20:53:42,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:53:42,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 20:53:42,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:53:42,716 INFO L87 Difference]: Start difference. First operand 137 states and 157 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) [2021-05-02 20:53:43,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:53:43,089 INFO L93 Difference]: Finished difference Result 145 states and 166 transitions. [2021-05-02 20:53:43,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 20:53:43,090 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) Word has length 97 [2021-05-02 20:53:43,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:53:43,091 INFO L225 Difference]: With dead ends: 145 [2021-05-02 20:53:43,091 INFO L226 Difference]: Without dead ends: 145 [2021-05-02 20:53:43,091 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 243.9ms TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-05-02 20:53:43,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-05-02 20:53:43,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-05-02 20:53:43,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 90 states have (on average 1.1111111111111112) internal successors, (100), 92 states have internal predecessors, (100), 34 states have call successors, (34), 21 states have call predecessors, (34), 20 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) [2021-05-02 20:53:43,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 166 transitions. [2021-05-02 20:53:43,094 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 166 transitions. Word has length 97 [2021-05-02 20:53:43,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:53:43,095 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 166 transitions. [2021-05-02 20:53:43,095 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) [2021-05-02 20:53:43,095 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 166 transitions. [2021-05-02 20:53:43,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-05-02 20:53:43,095 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:53:43,096 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-05-02 20:53:43,316 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-05-02 20:53:43,317 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:53:43,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:53:43,317 INFO L82 PathProgramCache]: Analyzing trace with hash -317970408, now seen corresponding path program 5 times [2021-05-02 20:53:43,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:53:43,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76856010] [2021-05-02 20:53:43,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:53:43,328 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:53:43,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [421027617] [2021-05-02 20:53:43,328 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:53:43,550 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-05-02 20:53:43,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:53:43,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 52 conjunts are in the unsatisfiable core [2021-05-02 20:53:43,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:53:43,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:43,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:43,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:43,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:43,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:43,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:43,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:43,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:43,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:43,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:43,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:43,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:43,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:43,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:43,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:43,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:43,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:43,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:43,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:43,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:43,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:43,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:43,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:43,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:43,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:43,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:43,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:43,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:44,025 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 52 proven. 40 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2021-05-02 20:53:44,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:53:44,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76856010] [2021-05-02 20:53:44,026 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:53:44,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421027617] [2021-05-02 20:53:44,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421027617] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:53:44,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:53:44,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-02 20:53:44,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115176597] [2021-05-02 20:53:44,026 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 20:53:44,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:53:44,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 20:53:44,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-05-02 20:53:44,027 INFO L87 Difference]: Start difference. First operand 145 states and 166 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 15 states have internal predecessors, (33), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) [2021-05-02 20:53:44,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:53:44,562 INFO L93 Difference]: Finished difference Result 158 states and 183 transitions. [2021-05-02 20:53:44,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 20:53:44,563 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 15 states have internal predecessors, (33), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) Word has length 105 [2021-05-02 20:53:44,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:53:44,564 INFO L225 Difference]: With dead ends: 158 [2021-05-02 20:53:44,564 INFO L226 Difference]: Without dead ends: 152 [2021-05-02 20:53:44,565 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 259.7ms TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-05-02 20:53:44,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-05-02 20:53:44,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 150. [2021-05-02 20:53:44,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 94 states have (on average 1.1063829787234043) internal successors, (104), 96 states have internal predecessors, (104), 34 states have call successors, (34), 22 states have call predecessors, (34), 21 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) [2021-05-02 20:53:44,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 170 transitions. [2021-05-02 20:53:44,568 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 170 transitions. Word has length 105 [2021-05-02 20:53:44,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:53:44,569 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 170 transitions. [2021-05-02 20:53:44,569 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 15 states have internal predecessors, (33), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) [2021-05-02 20:53:44,569 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 170 transitions. [2021-05-02 20:53:44,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-05-02 20:53:44,569 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:53:44,570 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:53:44,780 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-05-02 20:53:44,781 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:53:44,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:53:44,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1162442279, now seen corresponding path program 1 times [2021-05-02 20:53:44,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:53:44,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629172461] [2021-05-02 20:53:44,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:53:44,786 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:53:44,786 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [251879813] [2021-05-02 20:53:44,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:53:44,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:53:44,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 20:53:44,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:53:44,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:44,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:44,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:44,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:44,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:44,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:44,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:44,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:44,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:44,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:44,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:44,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:44,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:44,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:44,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:44,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:44,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:44,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:44,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:44,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:44,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:44,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:44,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:44,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:44,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:44,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:45,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:45,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:45,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:56:45,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629172461] [2021-05-02 20:56:45,215 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:56:45,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251879813] [2021-05-02 20:56:45,215 WARN L348 FreeRefinementEngine]: Global settings require throwing the following exception [2021-05-02 20:56:45,429 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:56:45,429 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.NegativeArraySizeException: -1239324874 at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionTir$ExplicitLhsPolynomialRelations.buildDualFiniteJunction(DualJunctionTir.java:651) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionTir$ExplicitLhsPolynomialRelations.buildCorrespondingFiniteJunctionForAntiDer(DualJunctionTir.java:615) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionTir$ExplicitLhsPolynomialRelations.buildBoundConstraint(DualJunctionTir.java:451) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionTir.tryToEliminateConjuncts(DualJunctionTir.java:205) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionTir.tryToEliminateOne(DualJunctionTir.java:160) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionTir.tryExhaustivelyToEliminate(DualJunctionTir.java:125) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionTir.tryToEliminate(DualJunctionTir.java:112) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToEliminateOne(QuantifierPusher.java:869) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyNewEliminationTechniquesExhaustively(QuantifierPusher.java:835) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDualJunctionEliminationTechniques(QuantifierPusher.java:753) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective2(QuantifierPusher.java:384) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:316) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.convert(QuantifierPusher.java:227) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.cacheConvert(TermTransformer.java:131) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer$Convert.walk(TermTransformer.java:79) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.transform(TermTransformer.java:272) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.eliminate(QuantifierPusher.java:144) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.eliminate(QuantifierPusher.java:166) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.eliminate(QuantifierPusher.java:160) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective2(QuantifierPusher.java:465) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:316) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.convert(QuantifierPusher.java:227) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.cacheConvert(TermTransformer.java:131) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer$Convert.walk(TermTransformer.java:79) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.transform(TermTransformer.java:272) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.eliminate(QuantifierPusher.java:144) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.eliminate(QuantifierPusher.java:166) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.tryToEliminate(PartialQuantifierElimination.java:87) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:246) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:440) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:201) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:299) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:248) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:612) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:437) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:69) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:63) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateAllErrorsAtOnce(TraceAbstractionStarter.java:317) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:171) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-05-02 20:56:45,436 INFO L168 Benchmark]: Toolchain (without parser) took 231939.83 ms. Allocated memory was 199.2 MB in the beginning and 5.8 GB in the end (delta: 5.6 GB). Free memory was 164.6 MB in the beginning and 4.8 GB in the end (delta: -4.6 GB). Peak memory consumption was 4.1 GB. Max. memory is 8.0 GB. [2021-05-02 20:56:45,436 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 199.2 MB. Free memory is still 181.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 20:56:45,448 INFO L168 Benchmark]: CACSL2BoogieTranslator took 220.82 ms. Allocated memory is still 199.2 MB. Free memory was 164.4 MB in the beginning and 182.5 MB in the end (delta: -18.0 MB). Peak memory consumption was 11.6 MB. Max. memory is 8.0 GB. [2021-05-02 20:56:45,449 INFO L168 Benchmark]: Boogie Preprocessor took 43.28 ms. Allocated memory is still 199.2 MB. Free memory was 182.5 MB in the beginning and 180.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-02 20:56:45,449 INFO L168 Benchmark]: RCFGBuilder took 244.79 ms. Allocated memory is still 199.2 MB. Free memory was 180.9 MB in the beginning and 165.2 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-02 20:56:45,449 INFO L168 Benchmark]: IcfgTransformer took 14.50 ms. Allocated memory is still 199.2 MB. Free memory was 165.2 MB in the beginning and 163.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 20:56:45,449 INFO L168 Benchmark]: TraceAbstraction took 231409.24 ms. Allocated memory was 199.2 MB in the beginning and 5.8 GB in the end (delta: 5.6 GB). Free memory was 163.1 MB in the beginning and 4.8 GB in the end (delta: -4.6 GB). Peak memory consumption was 4.1 GB. Max. memory is 8.0 GB. [2021-05-02 20:56:45,465 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 199.2 MB. Free memory is still 181.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 220.82 ms. Allocated memory is still 199.2 MB. Free memory was 164.4 MB in the beginning and 182.5 MB in the end (delta: -18.0 MB). Peak memory consumption was 11.6 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 43.28 ms. Allocated memory is still 199.2 MB. Free memory was 182.5 MB in the beginning and 180.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 244.79 ms. Allocated memory is still 199.2 MB. Free memory was 180.9 MB in the beginning and 165.2 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * IcfgTransformer took 14.50 ms. Allocated memory is still 199.2 MB. Free memory was 165.2 MB in the beginning and 163.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 231409.24 ms. Allocated memory was 199.2 MB in the beginning and 5.8 GB in the end (delta: 5.6 GB). Free memory was 163.1 MB in the beginning and 4.8 GB in the end (delta: -4.6 GB). Peak memory consumption was 4.1 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: NegativeArraySizeException: -1239324874 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NegativeArraySizeException: -1239324874: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionTir$ExplicitLhsPolynomialRelations.buildDualFiniteJunction(DualJunctionTir.java:651) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...