/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-u_unwindbound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 20:56:52,073 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 20:56:52,075 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 20:56:52,097 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 20:56:52,098 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 20:56:52,099 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 20:56:52,100 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 20:56:52,102 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 20:56:52,103 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 20:56:52,104 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 20:56:52,105 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 20:56:52,106 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 20:56:52,106 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 20:56:52,107 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 20:56:52,108 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 20:56:52,109 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 20:56:52,109 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 20:56:52,110 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 20:56:52,111 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 20:56:52,113 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 20:56:52,114 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 20:56:52,115 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 20:56:52,116 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 20:56:52,117 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 20:56:52,119 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 20:56:52,125 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 20:56:52,126 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 20:56:52,126 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 20:56:52,127 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 20:56:52,136 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 20:56:52,136 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 20:56:52,138 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 20:56:52,138 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 20:56:52,138 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 20:56:52,138 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 20:56:52,138 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 20:56:52,139 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 20:56:52,139 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 20:56:52,139 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 20:56:52,139 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 20:56:52,139 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 20:56:52,139 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 20:56:52,140 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 20:56:52,140 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 20:56:52,140 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 20:56:52,140 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 20:56:52,140 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 20:56:52,140 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:56:52,140 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 20:56:52,141 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 20:56:52,141 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 20:56:52,141 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 20:56:52,444 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 20:56:52,464 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 20:56:52,466 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 20:56:52,467 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 20:56:52,467 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 20:56:52,468 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-u_unwindbound100.c [2021-05-02 20:56:52,533 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/879e4f741/fdea49aecf8740f2a59e959775870e82/FLAG7efa1880c [2021-05-02 20:56:52,975 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 20:56:52,975 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-u_unwindbound100.c [2021-05-02 20:56:52,982 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/879e4f741/fdea49aecf8740f2a59e959775870e82/FLAG7efa1880c [2021-05-02 20:56:53,362 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/879e4f741/fdea49aecf8740f2a59e959775870e82 [2021-05-02 20:56:53,370 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 20:56:53,372 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 20:56:53,376 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 20:56:53,376 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 20:56:53,379 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 20:56:53,379 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:56:53" (1/1) ... [2021-05-02 20:56:53,380 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@639df9c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:56:53, skipping insertion in model container [2021-05-02 20:56:53,380 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:56:53" (1/1) ... [2021-05-02 20:56:53,386 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 20:56:53,400 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 20:56:53,495 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-u_unwindbound100.c[545,558] [2021-05-02 20:56:53,508 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:56:53,519 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 20:56:53,533 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-u_unwindbound100.c[545,558] [2021-05-02 20:56:53,556 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:56:53,568 INFO L208 MainTranslator]: Completed translation [2021-05-02 20:56:53,568 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:56:53 WrapperNode [2021-05-02 20:56:53,568 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 20:56:53,569 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 20:56:53,569 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 20:56:53,570 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 20:56:53,578 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:56:53" (1/1) ... [2021-05-02 20:56:53,578 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:56:53" (1/1) ... [2021-05-02 20:56:53,584 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:56:53" (1/1) ... [2021-05-02 20:56:53,584 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:56:53" (1/1) ... [2021-05-02 20:56:53,589 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:56:53" (1/1) ... [2021-05-02 20:56:53,592 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:56:53" (1/1) ... [2021-05-02 20:56:53,594 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:56:53" (1/1) ... [2021-05-02 20:56:53,595 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 20:56:53,596 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 20:56:53,596 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 20:56:53,596 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 20:56:53,609 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:56:53" (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 20:56:53,739 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 20:56:53,740 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 20:56:53,740 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 20:56:53,740 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 20:56:53,740 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 20:56:53,740 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 20:56:53,740 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 20:56:53,740 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 20:56:53,741 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 20:56:53,741 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 20:56:53,741 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-02 20:56:53,741 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 20:56:53,741 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 20:56:53,742 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 20:56:53,742 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 20:56:53,742 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 20:56:53,742 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 20:56:53,742 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 20:56:53,743 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 20:56:53,743 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 20:56:54,054 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 20:56:54,054 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 20:56:54,055 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:56:54 BoogieIcfgContainer [2021-05-02 20:56:54,056 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 20:56:54,056 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 20:56:54,056 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 20:56:54,057 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 20:56:54,059 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:56:54" (1/1) ... [2021-05-02 20:56:54,073 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:56:54 BasicIcfg [2021-05-02 20:56:54,073 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 20:56:54,075 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 20:56:54,075 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 20:56:54,077 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 20:56:54,077 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 08:56:53" (1/4) ... [2021-05-02 20:56:54,078 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a737d29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:56:54, skipping insertion in model container [2021-05-02 20:56:54,078 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:56:53" (2/4) ... [2021-05-02 20:56:54,078 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a737d29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:56:54, skipping insertion in model container [2021-05-02 20:56:54,078 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:56:54" (3/4) ... [2021-05-02 20:56:54,078 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a737d29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:56:54, skipping insertion in model container [2021-05-02 20:56:54,078 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:56:54" (4/4) ... [2021-05-02 20:56:54,079 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-u_unwindbound100.cJordan [2021-05-02 20:56:54,083 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 20:56:54,086 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 20:56:54,101 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 20:56:54,125 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 20:56:54,125 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 20:56:54,125 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 20:56:54,126 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 20:56:54,126 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 20:56:54,126 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 20:56:54,126 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 20:56:54,126 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 20:56:54,143 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 20:56:54,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 20:56:54,150 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:56:54,150 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:56:54,150 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:56:54,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:56:54,155 INFO L82 PathProgramCache]: Analyzing trace with hash 79654685, now seen corresponding path program 1 times [2021-05-02 20:56:54,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:56:54,162 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644830319] [2021-05-02 20:56:54,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:56:54,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:56:54,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 20:56:54,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:56:54,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 20:56:54,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:56:54,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 20:56:54,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:56:54,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644830319] [2021-05-02 20:56:54,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644830319] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:56:54,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:56:54,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 20:56:54,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776340837] [2021-05-02 20:56:54,423 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 20:56:54,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:56:54,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 20:56:54,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:56:54,436 INFO L87 Difference]: Start difference. First operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 20:56:54,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:56:54,552 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2021-05-02 20:56:54,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 20:56:54,554 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-05-02 20:56:54,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:56:54,560 INFO L225 Difference]: With dead ends: 38 [2021-05-02 20:56:54,560 INFO L226 Difference]: Without dead ends: 33 [2021-05-02 20:56:54,565 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 66.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:56:54,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-02 20:56:54,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2021-05-02 20:56:54,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 20:56:54,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2021-05-02 20:56:54,610 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 18 [2021-05-02 20:56:54,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:56:54,610 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2021-05-02 20:56:54,610 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 20:56:54,611 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2021-05-02 20:56:54,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 20:56:54,611 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:56:54,611 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:56:54,612 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 20:56:54,612 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:56:54,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:56:54,613 INFO L82 PathProgramCache]: Analyzing trace with hash -85369733, now seen corresponding path program 1 times [2021-05-02 20:56:54,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:56:54,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133295228] [2021-05-02 20:56:54,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:56:54,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:56:54,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 20:56:54,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:56:54,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 20:56:54,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:56:54,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 20:56:54,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:56:54,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133295228] [2021-05-02 20:56:54,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133295228] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:56:54,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:56:54,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 20:56:54,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348404396] [2021-05-02 20:56:54,748 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 20:56:54,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:56:54,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 20:56:54,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:56:54,749 INFO L87 Difference]: Start difference. First operand 32 states and 42 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, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 20:56:55,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:56:55,084 INFO L93 Difference]: Finished difference Result 45 states and 60 transitions. [2021-05-02 20:56:55,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:56:55,085 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, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-05-02 20:56:55,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:56:55,088 INFO L225 Difference]: With dead ends: 45 [2021-05-02 20:56:55,088 INFO L226 Difference]: Without dead ends: 45 [2021-05-02 20:56:55,089 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 169.9ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:56:55,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-02 20:56:55,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 36. [2021-05-02 20:56:55,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 22 states have internal predecessors, (27), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 20:56:55,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2021-05-02 20:56:55,110 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 18 [2021-05-02 20:56:55,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:56:55,111 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2021-05-02 20:56:55,111 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, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 20:56:55,111 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2021-05-02 20:56:55,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-02 20:56:55,113 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:56:55,114 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:56:55,116 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 20:56:55,117 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:56:55,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:56:55,119 INFO L82 PathProgramCache]: Analyzing trace with hash -1527809342, now seen corresponding path program 1 times [2021-05-02 20:56:55,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:56:55,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900303680] [2021-05-02 20:56:55,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:56:55,150 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:56:55,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [509100046] [2021-05-02 20:56:55,151 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 20:56:55,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:56:55,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 20:56:55,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:56:55,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:55,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:55,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:55,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:55,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:55,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 20:56:55,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:56:55,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900303680] [2021-05-02 20:56:55,351 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:56:55,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509100046] [2021-05-02 20:56:55,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509100046] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:56:55,352 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:56:55,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 20:56:55,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140340621] [2021-05-02 20:56:55,352 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 20:56:55,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:56:55,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 20:56:55,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 20:56:55,353 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 20:56:55,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:56:55,364 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2021-05-02 20:56:55,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 20:56:55,364 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-05-02 20:56:55,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:56:55,365 INFO L225 Difference]: With dead ends: 38 [2021-05-02 20:56:55,365 INFO L226 Difference]: Without dead ends: 38 [2021-05-02 20:56:55,365 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.0ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 20:56:55,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-02 20:56:55,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-05-02 20:56:55,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 24 states have internal predecessors, (29), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 20:56:55,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2021-05-02 20:56:55,370 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 20 [2021-05-02 20:56:55,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:56:55,370 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2021-05-02 20:56:55,370 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 20:56:55,370 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2021-05-02 20:56:55,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 20:56:55,371 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:56:55,371 INFO L523 BasicCegarLoop]: trace histogram [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 20:56:55,585 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-02 20:56:55,585 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:56:55,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:56:55,585 INFO L82 PathProgramCache]: Analyzing trace with hash 2128444854, now seen corresponding path program 1 times [2021-05-02 20:56:55,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:56:55,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172759319] [2021-05-02 20:56:55,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:56:55,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:56:55,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 20:56:55,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:56:55,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 20:56:55,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:56:55,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-05-02 20:56:55,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:56:55,774 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 20:56:55,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:56:55,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172759319] [2021-05-02 20:56:55,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172759319] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:56:55,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:56:55,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 20:56:55,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200089928] [2021-05-02 20:56:55,775 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 20:56:55,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:56:55,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 20:56:55,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:56:55,776 INFO L87 Difference]: Start difference. First operand 38 states and 47 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, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:56:56,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:56:56,033 INFO L93 Difference]: Finished difference Result 50 states and 64 transitions. [2021-05-02 20:56:56,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:56:56,034 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, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-02 20:56:56,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:56:56,035 INFO L225 Difference]: With dead ends: 50 [2021-05-02 20:56:56,035 INFO L226 Difference]: Without dead ends: 50 [2021-05-02 20:56:56,035 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 151.5ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:56:56,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-05-02 20:56:56,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2021-05-02 20:56:56,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 27 states have internal predecessors, (32), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 20:56:56,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2021-05-02 20:56:56,039 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 23 [2021-05-02 20:56:56,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:56:56,040 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2021-05-02 20:56:56,040 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, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:56:56,040 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2021-05-02 20:56:56,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 20:56:56,040 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:56:56,041 INFO L523 BasicCegarLoop]: trace histogram [3, 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 20:56:56,041 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-02 20:56:56,041 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:56:56,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:56:56,041 INFO L82 PathProgramCache]: Analyzing trace with hash 135546551, now seen corresponding path program 1 times [2021-05-02 20:56:56,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:56:56,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330460970] [2021-05-02 20:56:56,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:56:56,066 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:56:56,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1185131092] [2021-05-02 20:56:56,066 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 20:56:56,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:56:56,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 20:56:56,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:56:56,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:56,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:56,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:56,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:56,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:56,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:56,277 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:56:56,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:56:56,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330460970] [2021-05-02 20:56:56,278 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:56:56,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185131092] [2021-05-02 20:56:56,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185131092] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:56:56,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:56:56,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 20:56:56,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439670035] [2021-05-02 20:56:56,281 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 20:56:56,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:56:56,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 20:56:56,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:56:56,293 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 20:56:56,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:56:56,413 INFO L93 Difference]: Finished difference Result 57 states and 72 transitions. [2021-05-02 20:56:56,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:56:56,414 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2021-05-02 20:56:56,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:56:56,415 INFO L225 Difference]: With dead ends: 57 [2021-05-02 20:56:56,415 INFO L226 Difference]: Without dead ends: 56 [2021-05-02 20:56:56,415 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 44.9ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:56:56,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-02 20:56:56,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-05-02 20:56:56,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 35 states have internal predecessors, (41), 16 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 20:56:56,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2021-05-02 20:56:56,421 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 28 [2021-05-02 20:56:56,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:56:56,421 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2021-05-02 20:56:56,421 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 20:56:56,421 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2021-05-02 20:56:56,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 20:56:56,422 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:56:56,422 INFO L523 BasicCegarLoop]: trace histogram [4, 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 20:56:56,641 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:56:56,642 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:56:56,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:56:56,642 INFO L82 PathProgramCache]: Analyzing trace with hash 1016025214, now seen corresponding path program 1 times [2021-05-02 20:56:56,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:56:56,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722547063] [2021-05-02 20:56:56,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:56:56,662 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:56:56,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [345943001] [2021-05-02 20:56:56,662 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 20:56:56,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:56:56,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 20:56:56,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:56:56,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:56,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:56,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:56,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:56,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:56,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:56,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:56,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:56,845 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 20:56:56,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:56:56,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722547063] [2021-05-02 20:56:56,846 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:56:56,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345943001] [2021-05-02 20:56:56,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345943001] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:56:56,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:56:56,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 20:56:56,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867042048] [2021-05-02 20:56:56,847 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 20:56:56,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:56:56,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 20:56:56,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:56:56,848 INFO L87 Difference]: Start difference. First operand 56 states and 70 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 20:56:56,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:56:56,879 INFO L93 Difference]: Finished difference Result 69 states and 79 transitions. [2021-05-02 20:56:56,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 20:56:56,880 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 36 [2021-05-02 20:56:56,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:56:56,880 INFO L225 Difference]: With dead ends: 69 [2021-05-02 20:56:56,880 INFO L226 Difference]: Without dead ends: 69 [2021-05-02 20:56:56,881 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 9.3ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:56:56,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-05-02 20:56:56,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2021-05-02 20:56:56,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 42 states have (on average 1.1666666666666667) internal successors, (49), 44 states have internal predecessors, (49), 16 states have call successors, (16), 10 states have call predecessors, (16), 9 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 20:56:56,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 78 transitions. [2021-05-02 20:56:56,886 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 78 transitions. Word has length 36 [2021-05-02 20:56:56,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:56:56,886 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 78 transitions. [2021-05-02 20:56:56,886 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 20:56:56,886 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 78 transitions. [2021-05-02 20:56:56,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 20:56:56,887 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:56:56,887 INFO L523 BasicCegarLoop]: trace histogram [4, 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 20:56:57,100 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:56:57,101 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:56:57,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:56:57,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1017127481, now seen corresponding path program 1 times [2021-05-02 20:56:57,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:56:57,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165622827] [2021-05-02 20:56:57,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:56:57,110 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:56:57,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1891827277] [2021-05-02 20:56:57,111 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 20:56:57,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:56:57,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 20:56:57,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:56:57,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:57,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:57,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:57,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:57,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:57,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:57,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:57,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:57,337 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 20:56:57,338 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:56:57,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165622827] [2021-05-02 20:56:57,338 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:56:57,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891827277] [2021-05-02 20:56:57,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891827277] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:56:57,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:56:57,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-02 20:56:57,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232134179] [2021-05-02 20:56:57,339 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:56:57,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:56:57,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:56:57,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:56:57,340 INFO L87 Difference]: Start difference. First operand 68 states and 78 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:56:57,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:56:57,489 INFO L93 Difference]: Finished difference Result 72 states and 81 transitions. [2021-05-02 20:56:57,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:56:57,491 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2021-05-02 20:56:57,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:56:57,492 INFO L225 Difference]: With dead ends: 72 [2021-05-02 20:56:57,492 INFO L226 Difference]: Without dead ends: 58 [2021-05-02 20:56:57,492 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 84.1ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:56:57,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-02 20:56:57,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-05-02 20:56:57,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 37 states have internal predecessors, (42), 13 states have call successors, (13), 9 states have call predecessors, (13), 8 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 20:56:57,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2021-05-02 20:56:57,498 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 36 [2021-05-02 20:56:57,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:56:57,498 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2021-05-02 20:56:57,498 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:56:57,499 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2021-05-02 20:56:57,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 20:56:57,499 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:56:57,500 INFO L523 BasicCegarLoop]: trace histogram [4, 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, 1, 1, 1, 1] [2021-05-02 20:56:57,716 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:56:57,717 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:56:57,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:56:57,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1880362404, now seen corresponding path program 1 times [2021-05-02 20:56:57,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:56:57,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161651117] [2021-05-02 20:56:57,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:56:57,726 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:56:57,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1074111394] [2021-05-02 20:56:57,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:56:57,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:56:57,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 20:56:57,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:56:57,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:57,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:57,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:57,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:57,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:57,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:57,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:57,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:57,913 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 20:56:57,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:56:57,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161651117] [2021-05-02 20:56:57,914 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:56:57,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074111394] [2021-05-02 20:56:57,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074111394] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:56:57,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:56:57,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 20:56:57,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546133774] [2021-05-02 20:56:57,914 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 20:56:57,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:56:57,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 20:56:57,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:56:57,915 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 20:56:57,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:56:57,957 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2021-05-02 20:56:57,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 20:56:57,957 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 38 [2021-05-02 20:56:57,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:56:57,958 INFO L225 Difference]: With dead ends: 60 [2021-05-02 20:56:57,958 INFO L226 Difference]: Without dead ends: 60 [2021-05-02 20:56:57,958 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 15.6ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:56:57,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-02 20:56:57,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-05-02 20:56:57,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 39 states have internal predecessors, (44), 13 states have call successors, (13), 9 states have call predecessors, (13), 8 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 20:56:57,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2021-05-02 20:56:57,962 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 38 [2021-05-02 20:56:57,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:56:57,963 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2021-05-02 20:56:57,963 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 20:56:57,963 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2021-05-02 20:56:57,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-02 20:56:57,964 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:56:57,964 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:56:58,174 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:56:58,174 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:56:58,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:56:58,175 INFO L82 PathProgramCache]: Analyzing trace with hash 1525733273, now seen corresponding path program 1 times [2021-05-02 20:56:58,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:56:58,175 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684804754] [2021-05-02 20:56:58,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:56:58,181 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:56:58,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1250109605] [2021-05-02 20:56:58,181 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 20:56:58,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:56:58,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 20:56:58,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:56:58,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:58,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:58,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:58,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:58,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:58,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:58,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:58,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:58,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:58,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:58,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:58,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:58,596 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-02 20:56:58,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:56:58,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684804754] [2021-05-02 20:56:58,597 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:56:58,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250109605] [2021-05-02 20:56:58,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250109605] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:56:58,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:56:58,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 20:56:58,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769065332] [2021-05-02 20:56:58,598 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:56:58,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:56:58,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:56:58,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:56:58,599 INFO L87 Difference]: Start difference. First operand 60 states and 68 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 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 20:56:58,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:56:58,783 INFO L93 Difference]: Finished difference Result 75 states and 90 transitions. [2021-05-02 20:56:58,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:56:58,784 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 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 46 [2021-05-02 20:56:58,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:56:58,785 INFO L225 Difference]: With dead ends: 75 [2021-05-02 20:56:58,785 INFO L226 Difference]: Without dead ends: 75 [2021-05-02 20:56:58,785 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 52.2ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:56:58,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-05-02 20:56:58,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2021-05-02 20:56:58,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 45 states have (on average 1.1777777777777778) internal successors, (53), 46 states have internal predecessors, (53), 18 states have call successors, (18), 10 states have call predecessors, (18), 9 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-02 20:56:58,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 87 transitions. [2021-05-02 20:56:58,796 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 87 transitions. Word has length 46 [2021-05-02 20:56:58,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:56:58,797 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 87 transitions. [2021-05-02 20:56:58,797 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 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 20:56:58,797 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 87 transitions. [2021-05-02 20:56:58,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-02 20:56:58,798 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:56:58,798 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 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] [2021-05-02 20:56:59,001 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:56:59,001 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:56:59,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:56:59,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1447419744, now seen corresponding path program 1 times [2021-05-02 20:56:59,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:56:59,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318100388] [2021-05-02 20:56:59,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:56:59,009 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:56:59,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [622545631] [2021-05-02 20:56:59,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:56:59,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:56:59,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 20:56:59,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:56:59,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:59,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:59,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:59,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:59,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:59,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:59,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:59,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:59,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:59,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:59,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:59,191 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 42 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 20:56:59,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:56:59,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318100388] [2021-05-02 20:56:59,191 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:56:59,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622545631] [2021-05-02 20:56:59,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622545631] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:56:59,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:56:59,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 20:56:59,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880252891] [2021-05-02 20:56:59,193 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 20:56:59,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:56:59,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 20:56:59,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:56:59,194 INFO L87 Difference]: Start difference. First operand 73 states and 87 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 5 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 20:56:59,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:56:59,236 INFO L93 Difference]: Finished difference Result 86 states and 96 transitions. [2021-05-02 20:56:59,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 20:56:59,237 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 5 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 54 [2021-05-02 20:56:59,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:56:59,238 INFO L225 Difference]: With dead ends: 86 [2021-05-02 20:56:59,238 INFO L226 Difference]: Without dead ends: 86 [2021-05-02 20:56:59,238 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 12.2ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:56:59,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-05-02 20:56:59,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2021-05-02 20:56:59,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 54 states have (on average 1.1296296296296295) internal successors, (61), 55 states have internal predecessors, (61), 18 states have call successors, (18), 13 states have call predecessors, (18), 12 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-02 20:56:59,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 95 transitions. [2021-05-02 20:56:59,243 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 95 transitions. Word has length 54 [2021-05-02 20:56:59,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:56:59,244 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 95 transitions. [2021-05-02 20:56:59,244 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 5 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 20:56:59,244 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 95 transitions. [2021-05-02 20:56:59,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-02 20:56:59,245 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:56:59,245 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 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] [2021-05-02 20:56:59,456 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-02 20:56:59,457 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:56:59,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:56:59,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1448522011, now seen corresponding path program 1 times [2021-05-02 20:56:59,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:56:59,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759266455] [2021-05-02 20:56:59,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:56:59,479 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:56:59,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2071985719] [2021-05-02 20:56:59,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 20:56:59,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:56:59,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 20:56:59,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:56:59,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:59,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:59,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:59,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:59,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:59,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:59,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:59,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:59,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:59,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:59,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:59,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:59,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:59,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:59,822 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-02 20:56:59,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:56:59,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759266455] [2021-05-02 20:56:59,823 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:56:59,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071985719] [2021-05-02 20:56:59,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071985719] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:56:59,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:56:59,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 20:56:59,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828831600] [2021-05-02 20:56:59,824 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:56:59,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:56:59,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:56:59,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:56:59,825 INFO L87 Difference]: Start difference. First operand 85 states and 95 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-02 20:57:02,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:57:02,022 INFO L93 Difference]: Finished difference Result 97 states and 112 transitions. [2021-05-02 20:57:02,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:57:02,023 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 54 [2021-05-02 20:57:02,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:57:02,024 INFO L225 Difference]: With dead ends: 97 [2021-05-02 20:57:02,024 INFO L226 Difference]: Without dead ends: 97 [2021-05-02 20:57:02,024 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 54.0ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:57:02,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-05-02 20:57:02,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2021-05-02 20:57:02,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 61 states have (on average 1.1639344262295082) internal successors, (71), 63 states have internal predecessors, (71), 21 states have call successors, (21), 14 states have call predecessors, (21), 13 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-02 20:57:02,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 111 transitions. [2021-05-02 20:57:02,030 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 111 transitions. Word has length 54 [2021-05-02 20:57:02,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:57:02,030 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 111 transitions. [2021-05-02 20:57:02,030 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-02 20:57:02,030 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 111 transitions. [2021-05-02 20:57:02,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-02 20:57:02,031 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:57:02,031 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:57:02,235 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-05-02 20:57:02,236 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:57:02,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:57:02,236 INFO L82 PathProgramCache]: Analyzing trace with hash 1294763379, now seen corresponding path program 1 times [2021-05-02 20:57:02,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:57:02,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116458998] [2021-05-02 20:57:02,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:57:02,245 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:57:02,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1575305192] [2021-05-02 20:57:02,245 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 20:57:02,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:57:02,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 20:57:02,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:57:02,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:02,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:02,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:02,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:02,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:02,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:02,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:02,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:02,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:02,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:02,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:02,425 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 36 proven. 46 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-05-02 20:57:02,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:57:02,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116458998] [2021-05-02 20:57:02,425 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:57:02,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575305192] [2021-05-02 20:57:02,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575305192] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:57:02,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:57:02,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 20:57:02,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617074955] [2021-05-02 20:57:02,427 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 20:57:02,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:57:02,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 20:57:02,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:57:02,428 INFO L87 Difference]: Start difference. First operand 96 states and 111 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) [2021-05-02 20:57:02,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:57:02,501 INFO L93 Difference]: Finished difference Result 98 states and 113 transitions. [2021-05-02 20:57:02,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:57:02,501 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) Word has length 61 [2021-05-02 20:57:02,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:57:02,503 INFO L225 Difference]: With dead ends: 98 [2021-05-02 20:57:02,503 INFO L226 Difference]: Without dead ends: 98 [2021-05-02 20:57:02,503 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 30.9ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:57:02,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-05-02 20:57:02,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2021-05-02 20:57:02,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 63 states have (on average 1.1587301587301588) internal successors, (73), 65 states have internal predecessors, (73), 21 states have call successors, (21), 14 states have call predecessors, (21), 13 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-02 20:57:02,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 113 transitions. [2021-05-02 20:57:02,509 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 113 transitions. Word has length 61 [2021-05-02 20:57:02,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:57:02,509 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 113 transitions. [2021-05-02 20:57:02,509 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) [2021-05-02 20:57:02,509 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 113 transitions. [2021-05-02 20:57:02,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-02 20:57:02,510 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:57:02,510 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:57:02,731 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:57:02,732 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:57:02,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:57:02,732 INFO L82 PathProgramCache]: Analyzing trace with hash -1774996485, now seen corresponding path program 2 times [2021-05-02 20:57:02,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:57:02,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939125317] [2021-05-02 20:57:02,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:57:02,740 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:57:02,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1719247790] [2021-05-02 20:57:02,741 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 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 20:57:03,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:57:03,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:57:03,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-02 20:57:03,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:57:03,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:03,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:03,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:03,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:03,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:03,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:03,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:03,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:03,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:03,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:03,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:03,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:03,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:03,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:03,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:03,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:03,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:03,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:03,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:03,418 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 43 proven. 34 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-05-02 20:57:03,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:57:03,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939125317] [2021-05-02 20:57:03,419 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:57:03,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719247790] [2021-05-02 20:57:03,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719247790] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:57:03,419 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:57:03,419 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 20:57:03,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547122291] [2021-05-02 20:57:03,420 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 20:57:03,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:57:03,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 20:57:03,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:57:03,421 INFO L87 Difference]: Start difference. First operand 98 states and 113 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-02 20:57:03,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:57:03,960 INFO L93 Difference]: Finished difference Result 113 states and 135 transitions. [2021-05-02 20:57:03,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 20:57:03,960 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 64 [2021-05-02 20:57:03,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:57:03,961 INFO L225 Difference]: With dead ends: 113 [2021-05-02 20:57:03,962 INFO L226 Difference]: Without dead ends: 113 [2021-05-02 20:57:03,962 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 134.2ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:57:03,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-05-02 20:57:03,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 110. [2021-05-02 20:57:03,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 69 states have (on average 1.173913043478261) internal successors, (81), 72 states have internal predecessors, (81), 26 states have call successors, (26), 15 states have call predecessors, (26), 14 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-02 20:57:03,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 131 transitions. [2021-05-02 20:57:03,967 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 131 transitions. Word has length 64 [2021-05-02 20:57:03,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:57:03,967 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 131 transitions. [2021-05-02 20:57:03,968 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-02 20:57:03,968 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 131 transitions. [2021-05-02 20:57:03,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-02 20:57:03,976 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:57:03,976 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:57:04,177 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:57:04,177 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:57:04,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:57:04,178 INFO L82 PathProgramCache]: Analyzing trace with hash 112143503, now seen corresponding path program 1 times [2021-05-02 20:57:04,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:57:04,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428083927] [2021-05-02 20:57:04,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:57:04,190 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:57:04,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [516554226] [2021-05-02 20:57:04,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 20:57:04,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:57:04,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 20:57:04,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:57:04,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:04,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:04,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:04,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:04,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:04,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:04,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:04,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:04,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:04,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:04,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:04,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:04,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:04,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:04,424 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 16 proven. 92 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 20:57:04,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:57:04,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428083927] [2021-05-02 20:57:04,424 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:57:04,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516554226] [2021-05-02 20:57:04,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516554226] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:57:04,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:57:04,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 20:57:04,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120906127] [2021-05-02 20:57:04,425 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 20:57:04,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:57:04,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 20:57:04,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:57:04,426 INFO L87 Difference]: Start difference. First operand 110 states and 131 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 6 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2021-05-02 20:57:04,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:57:04,501 INFO L93 Difference]: Finished difference Result 133 states and 150 transitions. [2021-05-02 20:57:04,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:57:04,502 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 6 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) Word has length 68 [2021-05-02 20:57:04,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:57:04,503 INFO L225 Difference]: With dead ends: 133 [2021-05-02 20:57:04,503 INFO L226 Difference]: Without dead ends: 133 [2021-05-02 20:57:04,503 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 46.5ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:57:04,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-05-02 20:57:04,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 132. [2021-05-02 20:57:04,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 87 states have (on average 1.1379310344827587) internal successors, (99), 89 states have internal predecessors, (99), 26 states have call successors, (26), 19 states have call predecessors, (26), 18 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-02 20:57:04,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 149 transitions. [2021-05-02 20:57:04,508 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 149 transitions. Word has length 68 [2021-05-02 20:57:04,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:57:04,509 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 149 transitions. [2021-05-02 20:57:04,509 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 6 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2021-05-02 20:57:04,509 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 149 transitions. [2021-05-02 20:57:04,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-02 20:57:04,510 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:57:04,510 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 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 20:57:04,724 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 20:57:04,725 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:57:04,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:57:04,725 INFO L82 PathProgramCache]: Analyzing trace with hash 113245770, now seen corresponding path program 1 times [2021-05-02 20:57:04,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:57:04,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939486131] [2021-05-02 20:57:04,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:57:04,733 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:57:04,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [828178813] [2021-05-02 20:57:04,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 20:57:05,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:57:05,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-02 20:57:05,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:57:05,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:05,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:05,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:05,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:05,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:05,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:05,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:05,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:05,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:05,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:05,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:05,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:05,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:05,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:05,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:05,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:05,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:05,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:05,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:05,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:05,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:05,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:05,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:05,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:05,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:05,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:05,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:07:36,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:07:36,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939486131] [2021-05-02 21:07:36,739 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 21:07:36,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828178813] [2021-05-02 21:07:36,739 WARN L348 FreeRefinementEngine]: Global settings require throwing the following exception [2021-05-02 21:07:36,939 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-02 21:07:36,940 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.NegativeArraySizeException: -1072721305 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.QuantifierPusher.eliminate(QuantifierPusher.java:160) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.doit(QuantifierPusher.java:609) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective2(QuantifierPusher.java:405) 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.QuantifierPusher.eliminate(QuantifierPusher.java:160) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.doit(QuantifierPusher.java:609) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective2(QuantifierPusher.java:405) 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 21:07:36,951 INFO L168 Benchmark]: Toolchain (without parser) took 643578.62 ms. Allocated memory was 195.0 MB in the beginning and 7.2 GB in the end (delta: 7.0 GB). Free memory was 160.7 MB in the beginning and 5.9 GB in the end (delta: -5.7 GB). Peak memory consumption was 5.4 GB. Max. memory is 8.0 GB. [2021-05-02 21:07:36,951 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 195.0 MB. Free memory is still 177.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 21:07:36,951 INFO L168 Benchmark]: CACSL2BoogieTranslator took 193.22 ms. Allocated memory is still 195.0 MB. Free memory was 160.5 MB in the beginning and 150.5 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-05-02 21:07:36,951 INFO L168 Benchmark]: Boogie Preprocessor took 25.96 ms. Allocated memory is still 195.0 MB. Free memory was 150.5 MB in the beginning and 149.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 21:07:36,951 INFO L168 Benchmark]: RCFGBuilder took 459.64 ms. Allocated memory is still 195.0 MB. Free memory was 149.0 MB in the beginning and 163.3 MB in the end (delta: -14.3 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2021-05-02 21:07:36,951 INFO L168 Benchmark]: IcfgTransformer took 17.28 ms. Allocated memory is still 195.0 MB. Free memory was 163.3 MB in the beginning and 161.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-02 21:07:36,951 INFO L168 Benchmark]: TraceAbstraction took 642875.50 ms. Allocated memory was 195.0 MB in the beginning and 7.2 GB in the end (delta: 7.0 GB). Free memory was 161.2 MB in the beginning and 5.9 GB in the end (delta: -5.7 GB). Peak memory consumption was 5.4 GB. Max. memory is 8.0 GB. [2021-05-02 21:07:36,952 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 195.0 MB. Free memory is still 177.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 193.22 ms. Allocated memory is still 195.0 MB. Free memory was 160.5 MB in the beginning and 150.5 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 25.96 ms. Allocated memory is still 195.0 MB. Free memory was 150.5 MB in the beginning and 149.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 459.64 ms. Allocated memory is still 195.0 MB. Free memory was 149.0 MB in the beginning and 163.3 MB in the end (delta: -14.3 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * IcfgTransformer took 17.28 ms. Allocated memory is still 195.0 MB. Free memory was 163.3 MB in the beginning and 161.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 642875.50 ms. Allocated memory was 195.0 MB in the beginning and 7.2 GB in the end (delta: 7.0 GB). Free memory was 161.2 MB in the beginning and 5.9 GB in the end (delta: -5.7 GB). Peak memory consumption was 5.4 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: NegativeArraySizeException: -1072721305 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NegativeArraySizeException: -1072721305: 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...