/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_valuebound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 09:05:08,419 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 09:05:08,421 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 09:05:08,449 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 09:05:08,450 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 09:05:08,451 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 09:05:08,452 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 09:05:08,454 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 09:05:08,455 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 09:05:08,456 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 09:05:08,457 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 09:05:08,458 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 09:05:08,458 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 09:05:08,459 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 09:05:08,460 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 09:05:08,461 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 09:05:08,462 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 09:05:08,463 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 09:05:08,464 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 09:05:08,466 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 09:05:08,467 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 09:05:08,468 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 09:05:08,469 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 09:05:08,470 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 09:05:08,472 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 09:05:08,479 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 09:05:08,479 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 09:05:08,480 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 09:05:08,481 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 09:05:08,494 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 09:05:08,495 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 09:05:08,496 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 09:05:08,496 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 09:05:08,496 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 09:05:08,496 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 09:05:08,496 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 09:05:08,496 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 09:05:08,497 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 09:05:08,497 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 09:05:08,497 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 09:05:08,497 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 09:05:08,497 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 09:05:08,497 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 09:05:08,497 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 09:05:08,498 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 09:05:08,498 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 09:05:08,499 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 09:05:08,499 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 09:05:08,499 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 09:05:08,499 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 09:05:08,500 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 09:05:08,500 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 09:05:08,790 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 09:05:08,815 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 09:05:08,817 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 09:05:08,817 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 09:05:08,819 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 09:05:08,820 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-u_valuebound10.c [2021-05-06 09:05:08,876 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2cb18793f/b419dc5e6c6846da93eb50eb522362ce/FLAG56f0de3c0 [2021-05-06 09:05:09,379 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 09:05:09,380 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-u_valuebound10.c [2021-05-06 09:05:09,385 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2cb18793f/b419dc5e6c6846da93eb50eb522362ce/FLAG56f0de3c0 [2021-05-06 09:05:09,856 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2cb18793f/b419dc5e6c6846da93eb50eb522362ce [2021-05-06 09:05:09,859 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 09:05:09,861 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 09:05:09,862 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 09:05:09,863 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 09:05:09,875 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 09:05:09,876 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 09:05:09" (1/1) ... [2021-05-06 09:05:09,877 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8cd4de3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:05:09, skipping insertion in model container [2021-05-06 09:05:09,878 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 09:05:09" (1/1) ... [2021-05-06 09:05:09,884 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 09:05:09,900 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 09:05:09,998 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_valuebound10.c[545,558] [2021-05-06 09:05:10,012 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 09:05:10,020 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 09:05:10,057 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_valuebound10.c[545,558] [2021-05-06 09:05:10,081 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 09:05:10,097 INFO L208 MainTranslator]: Completed translation [2021-05-06 09:05:10,097 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:05:10 WrapperNode [2021-05-06 09:05:10,098 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 09:05:10,100 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 09:05:10,100 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 09:05:10,101 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 09:05:10,111 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:05:10" (1/1) ... [2021-05-06 09:05:10,114 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:05:10" (1/1) ... [2021-05-06 09:05:10,129 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:05:10" (1/1) ... [2021-05-06 09:05:10,129 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:05:10" (1/1) ... [2021-05-06 09:05:10,138 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:05:10" (1/1) ... [2021-05-06 09:05:10,141 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:05:10" (1/1) ... [2021-05-06 09:05:10,142 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:05:10" (1/1) ... [2021-05-06 09:05:10,144 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 09:05:10,145 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 09:05:10,145 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 09:05:10,145 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 09:05:10,145 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:05:10" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 09:05:10,226 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 09:05:10,227 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 09:05:10,227 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 09:05:10,227 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 09:05:10,227 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 09:05:10,227 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 09:05:10,227 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 09:05:10,228 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 09:05:10,228 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 09:05:10,228 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 09:05:10,228 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-06 09:05:10,228 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 09:05:10,229 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 09:05:10,229 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 09:05:10,229 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 09:05:10,229 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 09:05:10,229 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 09:05:10,229 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 09:05:10,230 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 09:05:10,230 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 09:05:10,516 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 09:05:10,516 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 09:05:10,518 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 09:05:10 BoogieIcfgContainer [2021-05-06 09:05:10,518 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 09:05:10,519 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 09:05:10,519 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 09:05:10,519 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 09:05:10,522 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 09:05:10" (1/1) ... [2021-05-06 09:05:10,535 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 09:05:10 BasicIcfg [2021-05-06 09:05:10,535 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 09:05:10,537 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 09:05:10,537 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 09:05:10,539 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 09:05:10,539 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 09:05:09" (1/4) ... [2021-05-06 09:05:10,540 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f6713fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 09:05:10, skipping insertion in model container [2021-05-06 09:05:10,540 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:05:10" (2/4) ... [2021-05-06 09:05:10,540 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f6713fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 09:05:10, skipping insertion in model container [2021-05-06 09:05:10,541 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 09:05:10" (3/4) ... [2021-05-06 09:05:10,541 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f6713fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 09:05:10, skipping insertion in model container [2021-05-06 09:05:10,541 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 09:05:10" (4/4) ... [2021-05-06 09:05:10,542 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-u_valuebound10.cJordan [2021-05-06 09:05:10,547 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 09:05:10,550 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 09:05:10,566 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 09:05:10,582 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 09:05:10,582 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 09:05:10,582 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 09:05:10,582 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 09:05:10,583 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 09:05:10,583 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 09:05:10,583 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 09:05:10,583 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 09:05:10,594 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 09:05:10,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 09:05:10,602 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:05:10,603 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:05:10,603 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:05:10,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:05:10,608 INFO L82 PathProgramCache]: Analyzing trace with hash 1011787902, now seen corresponding path program 1 times [2021-05-06 09:05:10,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:05:10,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370329837] [2021-05-06 09:05:10,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:05:10,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:05:10,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 09:05:10,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:05:10,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 09:05:10,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:05:10,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 09:05:10,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:05:10,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 09:05:10,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:05:10,814 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 09:05:10,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:05:10,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370329837] [2021-05-06 09:05:10,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370329837] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 09:05:10,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 09:05:10,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 09:05:10,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862493885] [2021-05-06 09:05:10,819 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 09:05:10,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:05:10,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 09:05:10,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 09:05:10,833 INFO L87 Difference]: Start difference. First operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 09:05:11,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:05:11,021 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2021-05-06 09:05:11,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 09:05:11,023 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2021-05-06 09:05:11,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:05:11,029 INFO L225 Difference]: With dead ends: 38 [2021-05-06 09:05:11,029 INFO L226 Difference]: Without dead ends: 33 [2021-05-06 09:05:11,030 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 47.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 09:05:11,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-06 09:05:11,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-06 09:05:11,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 09:05:11,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2021-05-06 09:05:11,068 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 28 [2021-05-06 09:05:11,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:05:11,069 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2021-05-06 09:05:11,070 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 09:05:11,070 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2021-05-06 09:05:11,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 09:05:11,071 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:05:11,072 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:05:11,072 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 09:05:11,072 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:05:11,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:05:11,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1710049411, now seen corresponding path program 1 times [2021-05-06 09:05:11,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:05:11,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951085170] [2021-05-06 09:05:11,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:05:11,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:05:11,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 09:05:11,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:05:11,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 09:05:11,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:05:11,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 09:05:11,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:05:11,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 09:05:11,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:05:11,268 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 09:05:11,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:05:11,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951085170] [2021-05-06 09:05:11,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951085170] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 09:05:11,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 09:05:11,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 09:05:11,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903593297] [2021-05-06 09:05:11,270 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 09:05:11,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:05:11,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 09:05:11,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 09:05:11,271 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 09:05:11,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:05:11,587 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2021-05-06 09:05:11,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 09:05:11,588 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2021-05-06 09:05:11,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:05:11,590 INFO L225 Difference]: With dead ends: 44 [2021-05-06 09:05:11,590 INFO L226 Difference]: Without dead ends: 44 [2021-05-06 09:05:11,593 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 156.7ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 09:05:11,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-06 09:05:11,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2021-05-06 09:05:11,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 12 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 09:05:11,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2021-05-06 09:05:11,613 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 28 [2021-05-06 09:05:11,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:05:11,614 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2021-05-06 09:05:11,614 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 09:05:11,614 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2021-05-06 09:05:11,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-06 09:05:11,615 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:05:11,615 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:05:11,615 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 09:05:11,615 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:05:11,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:05:11,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1042498848, now seen corresponding path program 1 times [2021-05-06 09:05:11,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:05:11,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418362143] [2021-05-06 09:05:11,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:05:11,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:05:11,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 09:05:11,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:05:11,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 09:05:11,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:05:11,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 09:05:11,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:05:11,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 09:05:11,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:05:11,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-05-06 09:05:11,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:05:11,874 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 09:05:11,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:05:11,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418362143] [2021-05-06 09:05:11,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418362143] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 09:05:11,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 09:05:11,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 09:05:11,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768530588] [2021-05-06 09:05:11,876 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 09:05:11,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:05:11,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 09:05:11,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 09:05:11,877 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 09:05:12,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:05:12,237 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2021-05-06 09:05:12,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 09:05:12,238 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-06 09:05:12,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:05:12,239 INFO L225 Difference]: With dead ends: 48 [2021-05-06 09:05:12,239 INFO L226 Difference]: Without dead ends: 48 [2021-05-06 09:05:12,240 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 207.7ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 09:05:12,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-06 09:05:12,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2021-05-06 09:05:12,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 12 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 09:05:12,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2021-05-06 09:05:12,244 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 33 [2021-05-06 09:05:12,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:05:12,245 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2021-05-06 09:05:12,245 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 09:05:12,245 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2021-05-06 09:05:12,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-06 09:05:12,246 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:05:12,246 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:05:12,246 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-06 09:05:12,246 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:05:12,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:05:12,247 INFO L82 PathProgramCache]: Analyzing trace with hash 1436069466, now seen corresponding path program 1 times [2021-05-06 09:05:12,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:05:12,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444458064] [2021-05-06 09:05:12,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:05:12,274 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:05:12,275 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1165250630] [2021-05-06 09:05:12,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:05:12,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:05:12,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 09:05:12,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:05:12,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:05:12,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:05:12,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:05:12,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:05:12,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:05:12,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:05:12,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:05:12,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:05:12,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:05:12,673 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-05-06 09:05:12,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:05:12,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444458064] [2021-05-06 09:05:12,674 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:05:12,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165250630] [2021-05-06 09:05:12,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165250630] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:05:12,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:05:12,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 09:05:12,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792601875] [2021-05-06 09:05:12,675 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 09:05:12,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:05:12,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 09:05:12,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 09:05:12,676 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 09:05:15,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:05:15,236 INFO L93 Difference]: Finished difference Result 62 states and 81 transitions. [2021-05-06 09:05:15,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 09:05:15,236 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 38 [2021-05-06 09:05:15,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:05:15,237 INFO L225 Difference]: With dead ends: 62 [2021-05-06 09:05:15,238 INFO L226 Difference]: Without dead ends: 61 [2021-05-06 09:05:15,238 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 54.4ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-06 09:05:15,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-05-06 09:05:15,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 55. [2021-05-06 09:05:15,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 30 states have (on average 1.2) internal successors, (36), 32 states have internal predecessors, (36), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 09:05:15,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 69 transitions. [2021-05-06 09:05:15,245 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 69 transitions. Word has length 38 [2021-05-06 09:05:15,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:05:15,245 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 69 transitions. [2021-05-06 09:05:15,246 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 09:05:15,246 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 69 transitions. [2021-05-06 09:05:15,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-06 09:05:15,247 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:05:15,247 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:05:15,448 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:05:15,448 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:05:15,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:05:15,449 INFO L82 PathProgramCache]: Analyzing trace with hash 5711864, now seen corresponding path program 1 times [2021-05-06 09:05:15,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:05:15,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277943989] [2021-05-06 09:05:15,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:05:15,463 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:05:15,463 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1139583149] [2021-05-06 09:05:15,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:05:15,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:05:15,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 09:05:15,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:05:15,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:05:15,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:05:15,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:05:15,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:05:15,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:05:15,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:05:15,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:05:15,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:05:15,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:05:15,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:05:15,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:05:15,797 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-05-06 09:05:15,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:05:15,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277943989] [2021-05-06 09:05:15,798 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:05:15,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139583149] [2021-05-06 09:05:15,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139583149] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:05:15,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:05:15,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 09:05:15,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182059306] [2021-05-06 09:05:15,799 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 09:05:15,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:05:15,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 09:05:15,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 09:05:15,804 INFO L87 Difference]: Start difference. First operand 55 states and 69 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 09:05:16,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:05:16,086 INFO L93 Difference]: Finished difference Result 74 states and 90 transitions. [2021-05-06 09:05:16,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 09:05:16,087 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 45 [2021-05-06 09:05:16,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:05:16,088 INFO L225 Difference]: With dead ends: 74 [2021-05-06 09:05:16,088 INFO L226 Difference]: Without dead ends: 73 [2021-05-06 09:05:16,089 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 107.5ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-06 09:05:16,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-05-06 09:05:16,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2021-05-06 09:05:16,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 42 states have (on average 1.1666666666666667) internal successors, (49), 44 states have internal predecessors, (49), 20 states have call successors, (20), 10 states have call predecessors, (20), 9 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-06 09:05:16,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 87 transitions. [2021-05-06 09:05:16,096 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 87 transitions. Word has length 45 [2021-05-06 09:05:16,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:05:16,096 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 87 transitions. [2021-05-06 09:05:16,097 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 09:05:16,097 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 87 transitions. [2021-05-06 09:05:16,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-06 09:05:16,098 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:05:16,098 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:05:16,320 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:05:16,321 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:05:16,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:05:16,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1597443315, now seen corresponding path program 1 times [2021-05-06 09:05:16,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:05:16,322 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902002438] [2021-05-06 09:05:16,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:05:16,330 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:05:16,331 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1993105847] [2021-05-06 09:05:16,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:05:16,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:05:16,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-06 09:05:16,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:05:16,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:05:16,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:05:16,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:05:16,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:05:16,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:05:16,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:05:16,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:05:16,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:05:16,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:05:16,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:05:16,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:05:16,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:05:16,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:05:16,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:05:16,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:05:16,866 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-05-06 09:05:16,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:05:16,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902002438] [2021-05-06 09:05:16,869 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:05:16,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993105847] [2021-05-06 09:05:16,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993105847] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:05:16,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:05:16,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 09:05:16,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293478643] [2021-05-06 09:05:16,870 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 09:05:16,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:05:16,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 09:05:16,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-06 09:05:16,871 INFO L87 Difference]: Start difference. First operand 72 states and 87 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-06 09:05:21,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:05:21,435 INFO L93 Difference]: Finished difference Result 91 states and 115 transitions. [2021-05-06 09:05:21,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 09:05:21,435 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 55 [2021-05-06 09:05:21,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:05:21,437 INFO L225 Difference]: With dead ends: 91 [2021-05-06 09:05:21,438 INFO L226 Difference]: Without dead ends: 91 [2021-05-06 09:05:21,438 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 110.7ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-06 09:05:21,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-05-06 09:05:21,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 85. [2021-05-06 09:05:21,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 49 states have (on average 1.163265306122449) internal successors, (57), 51 states have internal predecessors, (57), 25 states have call successors, (25), 11 states have call predecessors, (25), 10 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2021-05-06 09:05:21,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 105 transitions. [2021-05-06 09:05:21,447 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 105 transitions. Word has length 55 [2021-05-06 09:05:21,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:05:21,447 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 105 transitions. [2021-05-06 09:05:21,447 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-06 09:05:21,447 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 105 transitions. [2021-05-06 09:05:21,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-06 09:05:21,448 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:05:21,448 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:05:21,653 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:05:21,653 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:05:21,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:05:21,654 INFO L82 PathProgramCache]: Analyzing trace with hash -1535015126, now seen corresponding path program 1 times [2021-05-06 09:05:21,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:05:21,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408233610] [2021-05-06 09:05:21,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:05:21,660 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:05:21,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [857902107] [2021-05-06 09:05:21,661 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